Our hosting configuration at WPX Hosting is a standard LLMP (Linux + Litespeed Web Server Enterprise + MariaDB + PHP) setup. The servers are running OPcache as caching method for PHP code.
If you wish to enable LiteSpeed default cache, you would have to install the LiteSpeed Cache plugin, which you can find here: https://wordpress.org/plugins/litespeed-cache/
More information about LiteSpeed/MariaDB/PHP versions can be found in the following article.
If you have any other questions on the topic, don’t hesitate to contact the WPX Support Team via live chat (use the bottom right-hand widget) and they will respond and help within 30 seconds or less.