To watch Formula 1 in the Apple TV app in the US, your iPad will need to run iPadOS 26.2 or later. Some older iPad models may max out at iPadOS 18.x or earlier version. iPad models compatible with iPadOS 26 - Apple Support
However, if you prefer not to watch inside the Apple TV app, or your version Apple TV app doesn’t support F1, then F1 TV Premium remains available and is included at no cost in the US for Apple TV subscribers. You’ll just need to download the F1 TV app, and link your account through the F1 TV site. The F1 TV app on Apple devices now requires OS version 16.0 or later.
The Apple TV app (with F1) is also available on select smart TVs and third party streaming devices.
Get the Apple TV app on your smart TV or streaming device - Apple Support
Watch on these smart TVs and streaming devices - Apple Support
Additionally, live coverage is said to be available through DirecTV and Comcast Xfinity (for subscribers).
Formula 1 begins this weekend, exclusively on Apple TV in the US - Apple Newsroom