IPhone14pro - NFL+ to TV’s

You have a few options.

1. If you have a compatible TV or streaming device, you can download the app to it and log in with your Apple Account assuming that's what you used on your iPhone. Or your NFL account if you logged in with it on the NFL+ app on your iPhone. click here ➜ https://support.nfl.com/hc/en-us/articles/35869724274452-Which-devices-are-compatible-with-NFL
2. Use a Lighting Digital AV adapter to connect your iPhone to the TV and mirror the iPhone's screen to it. Do note, some games and other content may not be allowed over direct connection.
   1. click here ➜ Lightning Digital AV Adapter - Lightning to HDMI - Apple
3. Use airplay to mirror your iPhone to the TV on supported models. Again certain content may not be available to stream over Airplay.
   1. click here ➜ Use AirPlay to stream video or mirror the screen of your iPhone or iPad - Apple Support

More information at the NFL website:

https://support.nfl.com/hc/en-us/articles/35869781796884-Can-I-cast-NFL-or-NFL-Premium-content-to-my-Smart-TV-or-connected-device

try reading

How to watch Apple TV – Apple Support (UK)

same deal with the nfl stuff they offer I'm sure