With Manu out, Pop is trying to find more offense, so Bowen is playing little.
I don't think that Bowen has played enough yet this season for everyone to think that he is "done." I'm not saying he is or isn't. I'm just say that it's impossible to know at this point. Bowen had a great year defensively last year, despite many people only remembering the Lakers series.
I like that Mason is emerging and he should move into Finley's spot in the starting lineup. I think that's becoming more and more obvious. But I don't think that's obvious that Bowen is done as a starter or a key asset to this team.