Ir volume is not working

Try restarting just the remote, as detailed in: If your Apple TV remote isn't working - Apple Support

I am having the exact same issue with IR functionality. Reset the remote, restarted the Apple TV 4K. Id didn’t fix it. Any other thoughts would be helpful.

To be clear though, it is only IR volume. Power on and off still work.

Wretched— wrote:

It didn’t fix it. Any other thoughts would be helpful.

If you still need help after trying that, then contact Apple Support.