In the 1st QTR Bills are currently 62% pass (4th in the league)
2nd QTR 64% pass
3rd QTR 54% Pass
4th QTR 48% Pass.
So like I stated they are a pass first Offense and Identity.
https://www.sharpfootballstats.com/situational-run-pass-ratios--off-.html
52% pass over all the QTRs on 1st Down
where they dont pass first is in the Redzone, there they are very run heavy
https://www.sharpfootballstats.com/situational-run-pass-ratios--off-.html