I made a quick graphic/bracket to explain the new playoffs format
Explaining MLB's new 6-team per league playoff format
FCS Championship: Everything you need to know
New NFL playoff format 2021: Changes, expansion, bye rules
Playoff Schedule – ESPN Fan Support
Is the NFL playoffs first-round bye a disadvantage or an advantage
Playoff Seeding since Realignment (2002) : r/nfl
Updated look at NFC playoff picture after Week 17