The NFL is trying hard to resist doing anything drastic beyond the scope of their 2020 regular season, a 17-week schedule featuring 32 teams playing 16-game campaigns with one off-week in between. To date, they have had to move two games to different weeks explicitly because one of those teams were dealing with a Covid-19 outbreak. Several other games were moved to other weeks in order to accommodate those moves.
But it is reaching dangerously close territory in which the NFL is going to run out of weeks for some teams. Anybody who needs to have a game moved to another week after they have already had their bye will have run out of real estate unless there is an 18th week added.