apple plus subscription not working on my tv

Apple TV+ will not work on Apple TV (1st or 2nd generation).

Apple TV+ will work on Apple TV (3rd generation) with Apple TV Software 7.3 or later.

Identify your Apple TV model - Apple Support

All the ways to watch Apple TV+ - Apple Support

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If you have an Apple TV (2nd or 3rd generation) and two-factor authentication for your Apple ID, then you may be asked to type your password followed by the six-digit verification code directly into the password field. Additionally, there is a time limit, after which the code becomes invalid.

Try this: First enter the characters of your password (do not submit yet), then manually request a new verification code, then append that code to the password (no spaces or other separating characters), and then submit. That should help you get passed the time limit.

What do you mean “not working”? What happens instead? Do you get an error? What does it say?

Do you have a TV that supports the Apple TV app as one of its smart apps? If so, which one?

Do you have a connected streaming device with the Apple TV app? If so, which one?

Apple TV app - Devices - Apple

What is your model Apple TV? Identify your Apple TV model - Apple Support