PS: can we use Steam Link to stream a anti-cheat enabled game from a Windows computer to a Linux one running Steam?

That's how cheating works today. People simply use streaming and image recognition. The cheat may not run on the system on which the game is running. We are currently in a transition phase, but kernel-level AC systems in particular are likely to greatly accelerate the transition.

So the elephant in the room is that these kernel-level AC systems no longer work at all in the age of AI and real-time image recognition for everyone. Not only can you not play Valorant on Steam, you also can't play it on Nvidia Now. It's a classic retreat battle. And everyone knows how they end up.

Games like Battle Field don't need kernel level AC at all because they are not F2P. Cheaters will always be found sooner or later with AI because publishers have better training data. But this does not work in real time. So you need a paywall to prevent cheaters from constantly re-entering competitive matchmaking.

Valorant and Fortnite have a different business model. I fear one without a future.