once I subscribe to Apple TV on my device can I use the same subscription on my other devices?
Once I subscribe to Apple TV on my device can I use the same subscription on my other devices?
iPhone 11 Pro Max, iOS 14
Yes. The subscription is tied to your Apple ID, not a specific device.
As long as your other devices are logged in to the same Apple ID as the device you start he subscription on, they will automatically get access to the subscription.