I’m paying for a BET plus and AMC and I cannot watch it on Apple TV

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

• BET+ is listed as a Channel subscription, and should be accessible in the Apple TV app. Watch Now﹥Channels﹥BET+.
• AMC is not listed as a Channel subscription for you, and will need to be viewed in the separate AMC app.
• On Apple devices with both the Apple TV app and the separate AMC app, AMC shows may be accessible through the Apple TV app (Watch Now, Up Next).

Apple TV Channels FAQ: Services, pricing, availability, and everything else you need to know - Macworld

Subscribe to Apple TV channels in the Apple TV app - Apple Support