I don't mean this to sound callous but the world can't stop because this happened. Millions of people are affected in ways from hugely important (family, teammates) to important (NFL employees, travel agencies and lodging) to trivial (you need 9 points from Allen for a championship). All best wishes and prayers to Damar Hamlin but there is absolutely nothing anyone outside that hospital can do for him right now. People need to do what humans have done since the dawn of the species; life will go on.
So then. If the game isn't completed, no team in the AFC should earn a bye. Add one wild card team. Of course KC likely gets home field again without actually earning it. If the NFL wanted anything else then they don't throw that flag on Sutton.
Fantasy managers, you're all screwed, unless the stats from next week's games are used or unless you're allowed to replace from the bench ex-post facto. There's no fair solution there either.