Re Paire Remote
My AppleTV remote said the connection was lost and I tried re-pairing it every time I do it tells me to bring it closer and I've tried everything but it still keeps coming up.
Apple TV 4K, tvOS 14
This document tells you how to pair the Siri remote again:
If your Apple TV remote isn't working - Apple Support
Keep other bluetooth devices at a distance while doing this. E.g. better to not keep your phone in your pocket.
For ultimate closeness, lay the remote on top of the Apple TV box. Although that wasn’t needed when I did it.