what was explained to me is the cache on inmotion is on the back end of the server system embedded in the server.
Even making a change you need to clear the cache with the provided tool.
And it did not appear in htaccess nor config.conf or php ini.
I can't recall what the cache system is called but it is part of the server system files.
Or maybe I did
Nginx ????
Check
https://www.inmotionhosting.com/support/edu/cpanel/cache-manager-cpanel/as stated
Nginx as a powerful caching proxy in front of Apache