If the Bills win, we clinch the playoffs with either a Rams win (over Baltimore) or Colts (over Raiders) and Broncos (over Chargers) both winning.
This according to the NY Times playoff machine
https://www.nytimes.com/interactive/2021/upshot/buffalo-bills-nfl-playoff-picture.html#buf-atl-17=win
Statistically, the Jets game is more important than the Atlanta game. If we lose to ATL but beat the Jets, we're in no matter what else happens. Not so the other way around.