"EAC" is Easy Anti Cheat, sold by Epic.[1] Not EarthCoin.
"EOS", in this context, is probably Epic Online Services, not one of the 103 other known uses of that acronym.[2]
Here's a list of the games using those features.[3]
So, many of these issues are for people building games with Epic's Unreal Engine on Linux. The last time I tried UE5, after the three hour build, it complained I had an NVidia driver it didn't like. I don't use UE5, but I've tried it out of curiosity. They do support Linux, but, as is typical, it's not the first platform they get working. Epic does have support forums, and if this is some Epic problem encountered by a developer, it can probably be fixed or worked round.
Wine is impressive. It's amazing that they can run full 3D games effectively. Mostly. Getting Wine bugs fixed is somewhat difficult. The Wine people want bugs reported against the current dev version. Wine isn't set up to support multiple installed versions of itself. There's a thing called PlayOnLinux which does Wine version switching, but the Wine team does not accept bug reports if that's in use.[4] So you may need a spare machine with the dev version of Wine for bug reproduction.
[1] https://www.easy.ac/en-us/
[2] https://acronyms.thefreedictionary.com/EOS
[3] https://steamcommunity.com/groups/EpicGamesSucks/discussions...