Lutris + GE-Proton + umu works. If you use GE-Proton as the runner, Lutris automatically uses umu to launch the game which launches within the Steam Pressure Vessel container.

You can manage GE-Proton downloads using Protonplus. The latest version, last I checked, is GE-Proton9-15.

I long for the day when CEOs and companies get their heads out of their asses and stop pushing this “metaverse” nonsense.