He's been dreadful for the first team, and it's nothing to do with Arteta because it spans 3 other coaches. He was a real star for England youth sides, and basically took apart whoever he played against at youth level for Arsenal, but the only time he has looked like he could replicate that at senior level has been a couple of pre-season friendlies and Carabao Cup games where he played right wingback for Wenger.
A couple of years back, Dula used to say we should try him at right back, and I have wanted to see it myself for a while now. He no doubt has no interest because he sees himself as a genius attacking midfielder, but that aside, I think it could work. I don't see it coming together for him as an attacker at a club like Arsenal - Saka, Smith Rowe, Pépé are far too good for him to compete with any time soon.