With Robinson out now too they have no choice but to play Atwell. He got 28 snaps vs. KC and he'll probably see a similar workload these next 6 games.
You have to grade any WR on a curve given Perkins at QB and the offensive strategy, but they will see enough on tape from him by year's end to come to a decision about 2023.
They can just release him in March and save $783k. They can bring him to training camp and, if he doesn't make the final roster, they save $1.197M then. Or if he somehow makes the team as the WR5 or whatever great...