Is there a way to sync or connect apps or services to my Apple TV?

There's 2 ways to subscribe to Apps, through the standalone App for each service, or through the channel inside the Apple TV App.

If you subscribed through the stand alone App on the Apple TV, the you need to use the Stand Alone App on other platforms to access that subscription. You cannot use the channel inside the Apple TV app.

If you subscribed through the Channel inside the Apple TV App, then you can use the subscription with the channel inside the TV App on other platforms, but will not be able to use the stand alone App.

The Paramount+ app is available for Playstation 4 and Xbox Series S and Series X.

https://www.newsweek.com/paramount-plus-devices-ios-android-apple-roku-chromecast-1573742

So you should be able to use the stand alone app on those platforms.

On the Apple TV box there are 2 options to access Paramount+ If you used the stand alone App on the Apple TV box, then you need to use the stand alone App on the game console.

How to Get Paramount Plus on PlayStation (7 Steps)

Keep in mind that Paramount Plus is currently available for PS4 consoles only. With that said, we’ll first tell you how to install this app, as explained just below. 

• Start by getting your Paramount Plus subscription (1-month trial). 
• Then, turn to your PS4 for the rest of this procedure. 
• Navigate to the PlayStation Store app and select its search tool.
• Now, look up ‘Paramount Plus‘ and open this app’s overview screen. 
• Select ‘Download‘ on the left-hand side, which will download and install the app. 
• Once done, navigate to Library > Apps, and launch Paramount Plus. 
• Log in following the on-screen instructions and access the app. That’s it!

Again, if you used the stand alone Paramount+ App on your Apple TV, then you have to log in on the stand alone app on the console.

If you used the channel inside the Apple TV App , then you can use the channel inside the Apple TV App on the console.

However you subscribed is what determines how you can watch it on another platform.

You would need to go into settings and make sure you are signed in with your Apple ID.

Get the Apple TV app on your smart TV, streaming device, or game console - Apple Support

Use the website https://www.paramountplus.com/apple/ to link your ParamountPlus account with your Apple ID.