If I had a dollar for every time people recommended Blue mics while any dynamic mic would've been a better option, I'd be a rich man.
hagelslager
Considering it's a Bethesda developed game, I think it's safe to say there has been no optimisation at all.
Iron out the bugs? That would be an improvement compared to Skyrim.
A pubic louse in this case
Running a Fairphone 4 with IodéOS (another de-Googled privacy focused Android) for close to two years now and I agree that it's a capable phone which doesn't limit myself in any way.
As you mentioned the biggest downside is the camera, which apparently has something to do with the firmware.
Edit: regarding the headphone situation: I'm using Austrian Audio (=former AKG engineering team) Hi-X25BT headphones, which are noticeably better than pods or cheap headphones and have been running well over a year now. They come with both (mini-)jack to USB-C and USB-C to USB-C cables, but I haven't tried the latter yet.
And it certainly doesn't help that a great "classic Bioware" game was released by Larian (... again).
Indeed, the job of most AAA game studios is to get as much money as possible from the gamers to their shareholders.
Have you looked at BattleBit Remastered? It looks janky, but scratches an itch the Battlefield series can't reach for a while now.
Have you looked at boom arms? They reach up and over and won't get in the way of your hands/arms.