I have it running through lutris with just wine. Proton and Proton GE result in the launcher crashing

Just had to make sure that steam was launched on the PC first and it worked just fine. Transferred The Division 2 very fast.

I’ve had this work from POP OS to steam deck

In Heroic

Try adding the argument:

PROTON_VERB=waitforexitandrun

If you’re in Game Mode you can click the cog button, go to Compatibility and select a proton version. This may help

Edit: you may also need to make sure you have Steam Play enabled. I believe the latest system update enables this by default.

Fourth so far