Hey Vkev29,
We understand your concern. Since your stereo pair works as expected when using your iPad, we'd like to provide you with a few steps that may be able to correct this behavior with your Apple TV 4K:
Restart Apple TV
"Do any of the following:
- Press and hold both the Back
(Siri Remote 2nd generation or later) or
(Siri Remote 1st generation) and TV
buttons on the Siri Remote until the Apple TVstatus light blinks rapidly. - Disconnect Apple TV from the power outlet, wait five seconds, then reconnect it.
- Open Settings
on Apple TV, go to System and select Restart."
Reset Apple TV
- "Open Settings
on Apple TV. - Go to System > Reset, then select Reset.
- Resetting Apple TV and restoring it to factory settings can take some time, so be patient. If Apple TV still doesn’t respond, do one of the following:
- If you have an Apple TV 4K: Contact Apple TV Support.
- If you have an Apple TV HD and a Mac with macOS Catalina or later: Disconnect the power and HDMI cables from Apple TV. Connect one end of a USB-C cable (sold separately) to Apple TV and the other end to your computer. Open the Finder on your computer, select Apple TV in the sidebar, then select Restore. If that doesn’t work, contact Apple TV Support.
- If you have an Apple TV HD and a PC with iTunes or a Mac with macOS Mojave or earlier: Disconnect the power and HDMI cables from Apple TV. Connect one end of a USB-C cable (sold separately) to Apple TV and the other end to your computer. Open iTunes on your computer, select Apple TV in the Source list, then select Restore. If that doesn’t work, contact Apple TV Support."
If you continue to experience the same behavior, we suggest that you reach out to Apple directly. They will be able to assist you further. Click here to connect with them: Get Support
All the best.