They can’t, but that is not the purpose. If the chat control passes then all big services will be forced to leave EU or build in a backdoor. That will give them control over more than 90 % of the population and satisfies their goal. You and your friends are a rounding error. And if you would perform a crime, or are suspected of one, they can use the fact that you encrypt your messages against you.

Arc Raiders is playable in Linux, it got gold in protondb.

Path of Exile also got gold and PoE2 is platinum.

R.E.P.O is platinum.

That should make more than half of the top 10 games compatible in Linux. Unless it needs to be native for compatible, but I don’t have a problem with proton as long as it’s enough to select the latest proton version to be able to play.

My company also uses both. We create support tickets in ServiceNow but it is also used for requesting access to different programs and network drives. It has been used for a couple of years and I have still not figured out how to see what I have access to, which feels like a basic feature.