The AFC playoff rules have been changed, and the Chiefs largely benefitted?
Bills-Bengals game canceled, creating many playoff scenarios - Los Angeles Times
NFL officially declares Bills vs. Bengals a no-contest, reveals AFC title game plan
How Bills-Bengals Cancellation Affects Playoffs, Championship Game
NFL Will Not Complete Bills-Bengals Game Where Damar Hamlin Was Hurt – The Hollywood Reporter
Week 17 Buffalo-Cincinnati game will not be resumed; neutral AFC Championship Game site being considered
NFL owners approve AFC playoff plan after Buffalo Bills vs Cincinnati Bengals is cancelled, NFL News
Bills-Bengals game postponed after Damar Hamlin's cardiac arrest won't be made up, NFL says
Bills-Bengals will not be resumed, declared no-contest by NFL - Pats Pulpit
Here's How The NFL Is Handling AFC Playoffs Home-Field Advantage