Latest Proton Experimental together with Proton BattlEye Runtime

When running fullscreen mode, the game window sometimes just disappears, this can be mitigated by using borderless

Ubisoft Connect will tell you all the time that your graphics driver is not supported and maybe that's also the cause for my render resolution being constantly set very low, I have to change it pretty much every game.

And also Multiplayer doesn't work yet, you'll make it into a round but during the operator selection screen, BattlEye will kick you (no ban so far).

Other games using BattlEye apparently work now (such as Ark), so it's probably on Ubisoft's side to enable Proton support.