Hmm, my list is much longer. The other two Wordpress sites hosted on this server are running fine under PHP 8.1.

Code
yum list installed | grep php81
cpanel-php81.x86_64                        8.1.29-1.cp110~el7       installed
cpanel-php81-auth-sasl2.noarch             0.2.0-1.cp110~el7        installed
cpanel-php81-cache.noarch                  1.5.6-1.cp110~el7        installed
cpanel-php81-console-color.noarch          1.0.3-1.cp110~el7        installed
cpanel-php81-console-table.noarch          1.3.1-1.cp110~el7        installed
cpanel-php81-date.noarch                   1.4.7-1.cp110~el7        installed
cpanel-php81-date-holidays.noarch          0.21.8-1.cp110~el7       installed
cpanel-php81-date-holidays-australia.noarch
cpanel-php81-date-holidays-austria.noarch  0.1.6-1.cp110~el7        installed
cpanel-php81-date-holidays-brazil.noarch   0.1.2-1.cp110~el7        installed
cpanel-php81-date-holidays-croatia.noarch  0.1.1-1.cp110~el7        installed
cpanel-php81-date-holidays-czech.noarch    0.1.0-1.cp110~el7        installed
cpanel-php81-date-holidays-denmark.noarch  0.1.3-1.cp110~el7        installed
cpanel-php81-date-holidays-englandwales.noarch
cpanel-php81-date-holidays-finland.noarch  0.1.2-1.cp110~el7        installed
cpanel-php81-date-holidays-germany.noarch  0.1.2-1.cp110~el7        installed
cpanel-php81-date-holidays-iceland.noarch  0.1.2-1.cp110~el7        installed
cpanel-php81-date-holidays-ireland.noarch  0.1.3-1.cp110~el7        installed
cpanel-php81-date-holidays-italy.noarch    0.1.1-1.cp110~el7        installed
cpanel-php81-date-holidays-japan.noarch    0.1.3-1.cp110~el7        installed
cpanel-php81-date-holidays-netherlands.noarch
cpanel-php81-date-holidays-norway.noarch   0.1.2-1.cp110~el7        installed
cpanel-php81-date-holidays-phpdotnet.noarch
cpanel-php81-date-holidays-portugal.noarch 0.1.1-1.cp110~el7        installed
cpanel-php81-date-holidays-romania.noarch  0.1.2-1.cp110~el7        installed
cpanel-php81-date-holidays-russia.noarch   0.1.0-1.cp110~el7        installed
cpanel-php81-date-holidays-sanmarino.noarch
cpanel-php81-date-holidays-serbia.noarch   0.1.0-1.cp110~el7        installed
cpanel-php81-date-holidays-slovenia.noarch 0.1.2-1.cp110~el7        installed
cpanel-php81-date-holidays-spain.noarch    0.1.4-1.cp110~el7        installed
cpanel-php81-date-holidays-sweden.noarch   0.1.3-1.cp110~el7        installed
cpanel-php81-date-holidays-turkey.noarch   0.1.1-1.cp110~el7        installed
cpanel-php81-date-holidays-ukraine.noarch  0.1.2-1.cp110~el7        installed
cpanel-php81-date-holidays-uno.noarch      0.1.3-1.cp110~el7        installed
cpanel-php81-date-holidays-usa.noarch      0.1.1-1.cp110~el7        installed
cpanel-php81-date-holidays-venezuela.noarch
cpanel-php81-file.noarch                   1.4.1-1.cp110~el7        installed
cpanel-php81-file-find.noarch              1.3.3-1.cp110~el7        installed
cpanel-php81-file-fstab.noarch             2.0.3-1.cp110~el7        installed
cpanel-php81-html-template-it.noarch       1.3.1-1.cp110~el7        installed
cpanel-php81-http.noarch                   1.4.1-1.cp110~el7        installed
cpanel-php81-http-request.noarch           1.4.4-1.cp110~el7        installed
cpanel-php81-http-webdav-server.noarch     1.0.0-1.cp110~el7        installed
cpanel-php81-less.noarch                   0.5.0-1.cp110~el7        installed
cpanel-php81-log.noarch                    1.13.3-1.cp110~el7       installed
cpanel-php81-mail.noarch                   1.4.1-1.cp110~el7        installed
cpanel-php81-mail-mime.noarch              1.10.11-1.cp110~el7      installed
cpanel-php81-mdb2.noarch                   2.4.1-1.cp110~el7        installed
cpanel-php81-net-dns2.noarch               1.5.0-1.cp110~el7        installed
cpanel-php81-net-ftp.noarch                1.4.1-1.cp110~el7        installed
cpanel-php81-net-imap.noarch               1.1.3-1.cp110~el7        installed
cpanel-php81-net-smtp.noarch               1.10.0-1.cp110~el7       installed
cpanel-php81-net-socket.noarch             1.2.2-1.cp110~el7        installed
cpanel-php81-net-url.noarch                1.0.15-1.cp110~el7       installed
cpanel-php81-net-useragent-detect.noarch   2.5.2-1.cp110~el7        installed
cpanel-php81-pear-command-packaging.noarch 0.3.0-1.cp110~el7        installed
cpanel-php81-services-weather.noarch       1.4.7-1.cp110~el7        installed
cpanel-php81-text-figlet.noarch            1.0.2-1.cp110~el7        installed
cpanel-php81-xml-parser.noarch             1.3.8-1.cp110~el7        installed
cpanel-php81-xml-rpc.noarch                1.5.5-1.cp110~el7        installed
cpanel-php81-xml-serializer.noarch         0.21.0-1.cp110~el7       installed
cpanel-php81-xml-svg.noarch                1.1.0-1.cp110~el7        installed
ea-php81.x86_64                            8.1.29-1.1.2.cpanel      @EA4-c7
ea-php81-build.x86_64                      8.1.29-1.1.2.cpanel      @EA4-c7
ea-php81-libc-client.x86_64                2007f-27.27.9.cpanel     @EA4-c7
ea-php81-libc-client-devel.x86_64          2007f-27.27.9.cpanel     @EA4-c7
ea-php81-libc-client-static.x86_64         2007f-27.27.9.cpanel     @EA4-c7
ea-php81-pear.noarch                       1.10.13-6.6.19.cpanel    @EA4-c7
ea-php81-php-bcmath.x86_64                 8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-calendar.x86_64               8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-cli.x86_64                    8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-common.x86_64                 8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-curl.x86_64                   8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-dba.x86_64                    8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-devel.x86_64                  8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-enchant.x86_64                8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-exif.x86_64                   8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-fileinfo.x86_64               8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-fpm.x86_64                    8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-ftp.x86_64                    8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-gd.x86_64                     8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-gettext.x86_64                8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-gmp.x86_64                    8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-iconv.x86_64                  8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-intl.x86_64                   8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-ldap.x86_64                   8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-litespeed.x86_64              8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-mbstring.x86_64               8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-mysqlnd.x86_64                8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-opcache.x86_64                8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-pdo.x86_64                    8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-pgsql.x86_64                  8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-posix.x86_64                  8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-process.x86_64                8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-pspell.x86_64                 8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-snmp.x86_64                   8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-soap.x86_64                   8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-sockets.x86_64                8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-xml.x86_64                    8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-php-zip.x86_64                    8.1.29-1.2.5.cpanel      @EA4-c7
ea-php81-runtime.x86_64                    8.1.29-1.1.2.cpanel      @EA4-c7

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