Bills have a top-3 QB in the league, and should have a top-5 offense in the league (they have the past 3 years). It isn’t really fair to compare Davis to WR #2 on other teams. His stats should be better based on the offense that he’s in. Other WRs have Sam Howell and Zach Wilson throwing to them.
The only question you should ask, is if another WR were given the same reps in the Bills offense at Davis’ spot, would they perform better.
I think a lot of WRs would perform better, and it’s an obvious opportunity to upgrade.