How to find certain processes on user pc?

If you do it from an associated service, sure.
Games and developers who have enough time and money to waste on that will do it by following all applicable compliance.

Also about 90% of the time you can just get a different version of cheat engine or whatever that has no headers and avoids detection in under a minute, so I still think it’s completely pointless, but that’s up to the developers to decide independently.