Hi bdholde,
It sounds like you're wondering about your Paramount+ Smithsonian Channel content using Apple TV channels. We're glad you've joined us in Apple Support Communities. Let's see if this helps.
Are you signed into Paramount+ currently on your Apple TV? You can check in Settings > Users and Accounts > [account name] Subscriptions or as outlined in Subscribe to Apple TV+ or an Apple TV channel in the Apple TV app.
If the issue remains after following those steps, let us know if you have the latest version of tvOS as outlined in the section "Here's what you need" in Subscribe to Apple TV channels in the Apple TV app. You can check for tvOS updates by following the steps in How to update your Apple TV.
We hope that helps with your question and take care!