I am sorry to hear that you too have issues with eZoic.
Unfortunately, I am afraid you cannot have the cache working while using eZoic
eZoic I am afraid they manage and also disable all the cache on the Cloudflare side (at least due to their delivery of the ads) - even that was a case on my WordPress website, none of the caching plugin for WordPress worked well.
See my post from below:
There are topics about the issues here, please use to find possible solution or at least gather some useful and helpful information from other customers/users.
Unfortunately, there are also topics here where people try to setup eZoic and have issues with it. While using , I’ve found this: