Last I saw it was about merging in the upstream CEF wayland support

but yes, the client could be x11 and somehow still launch games in wayland, which could also be a solution - not too dissimilar to gamescope I suppose. I ain’t got no clue on how that works tho ¯⁠\⁠_⁠(⁠ツ⁠)⁠_⁠/⁠¯