Didn't they manage to get Indiana Jones working after a while? That's on the same engine, right? I'll be patient. Don't have the energy for Doom at the moment anyways.
I honestly had no issue with Indiana Jones at launch on the Deck. My tolerance for performance issues is probably higher than average, granted, but I started playing it within a few days of launch on the Deck and beat the main story within a few weeks of that. It was officially unsupported and there were absolutely some framerate hiccups, but it was totally playable and enjoyable. It actually ran better on the Deck than my desktop (also Linux, to be fair) for a while because of nvidia driver issues. The faster pace of Doom will make it more of a problem, though.