Apple TV

The Sports tab in the Apple TV app is just a framework for connecting to other apps or channels that carry those televised games. It requires a subscription with any of those sports content providers. It is fragmented.

Sports in the Apple TV app - Apple Support

The only sport included with an Apple TV+ subscription at this time, is Friday Night Baseball (two games on Fridays), and soccer in the near future.

Apple and Major League Baseball to offer “Friday Night Baseball” - Apple Newsroom

Apple and MLS to present all MLS matches for 10 years, beginning in 2023 - Apple Newsroom

You have a subscription of what? If you are referring to Apple TV+ (not to be confused with the Apple TV app or a physical Apple TV), also please let us know which model ( Identify your Apple TV model ) Apple TV you own.