I posted this in a comment, but it may be useful to have a separated post and update it if new communities are made.

NFL !nfl@lemmy.ml - !nfl@lemmy.world
Arizona Cardinals !azcardinals@lemmy.ml
Chicago Bears !chibears@1337lemmy.com
Cincinnati Bengals !bengals@lemmy.world
Cleveland Browns !browns@lemmy.world
Dallas Cowboys !dallascowboys@lemmy.ml
Denver Broncos !denverbroncos@lemmy.ml
Detroit Lions !detroitlions@sh.itjust.works
Green Bay Packers !packers@sh.itjust.works
Houston Texans !texans@lemmy.rogers-net.com
Indianapolis Colts !indianapoliscolts@midwest.social
Kansas City Chiefs !kansascitychiefs@lemmy.world
Jacksonville Jaguars !jaguars@lemmy.ml
Los Angeles Chargers !chargers@sh.itjust.works
Los Angeles Rams !larams@lemmy.world
Minnesota Vikings !minnesotavikings@feddit.de
New England Patriots !patriots@lemmy.ml
New York Giants !newyorkgiants@lemmy.ml
New York Jets !nyjets@lemmy.ml
Philadelphia Eagles !eagles@lemmy.world - !eagles@philly.page
Pittsburgh Steelers !steelers@lemmy.world
San Francisco 49ers !49ers@lemmy.world
Seattle Seahawks !seahawks@lemmy.ml
Washington Commanders !commanders@sh.itjust.works

If you are a mod from one of them, you can add it to your sidebar:

NFL [!nfl@lemmy.ml](https://lemmy.ml/c/nfl) - [!nfl@lemmy.world](https://lemmy.world/c/nfl) \
Arizona Cardinals [!azcardinals@lemmy.ml](https://lemmy.ml/c/azcardinals) \
Chicago Bears [!chibears@1337lemmy.com](https://1337lemmy.com/c/chibears) \
Cincinnati Bengals [!bengals@lemmy.world](https://lemmy.world/c/bengals) \
Cleveland Browns [!browns@lemmy.world](https://lemmy.world/c/browns) \
Dallas Cowboys [!dallascowboys@lemmy.ml](https://lemmy.ml/c/dallascowboys) \
Denver Broncos [!denverbroncos@lemmy.ml](https://lemmy.ml/c/denverbroncos) \
Detroit Lions [!detroitlions@sh.itjust.works](sh.itjust.works/c/detroitlions) \
Green Bay Packers [!packers@sh.itjust.works](https://sh.itjust.works/c/packers) \
Houston Texans [!texans@lemmy.rogers-net.com](https://lemmy.rogers-net.com/c/texans) \
Indianapolis Colts [!indianapoliscolts@midwest.social](https://midwest.social/c/indianapoliscolts) \
Kansas City Chiefs [!kansascitychiefs@lemmy.world](https://lemmy.world/c/kansascitychiefs) \
Jacksonville Jaguars [!jaguars@lemmy.ml](https://lemmy.ml/c/jaguars) \
Los Angeles Chargers [!chargers@sh.itjust.works](https://sh.itjust.works/c/chargers) \
Los Angeles Rams [!larams@lemmy.world](https://lemmy.world/c/larams) \
Minnesota Vikings [!minnesotavikings@feddit.de](https://feddit.de/c/minnesotavikings) \
New England Patriots [!patriots@lemmy.ml](https://lemmy.ml/c/patriots) \
New York Giants [!newyorkgiants@lemmy.ml](https://lemmy.ml/c/newyorkgiants) \
New York Jets [!nyjets@lemmy.ml](https://lemmy.ml/c/nyjets) \
Philadelphia Eagles [!eagles@lemmy.world](https://lemmy.world/c/eagles) - [!eagles@philly.page](philly.page/c/eagles) \
Pittsburgh Steelers [!steelers@lemmy.world](https://lemmy.world/c/steelers) \
San Francisco 49ers [!49ers@lemmy.world](https://lemmy.world/c/49ers) \
Seattle Seahawks [!seahawks@lemmy.ml](https://lemmy.ml/c/seahawks) \
Washington Commanders [!commanders@sh.itjust.works](https://sh.itjust.works/c/commanders)

Updated 2023/06/12
Changed format and added new communities from the comments. Thanks to @Weird_With_A_Beard@sh.itjust.works.>

Updated 2023/06/13 Bengals, Colts and Commanders communities added to the list. Giants and Chargers added to the list. Steelers also added to the list.