That is interesting. I am seeing the same thing on a Note 20 Ultra running the beta software. I have two watches and the one on the charger shows up in the "SmartThings Find" window but the other one does not.
I have note 20 ultra to. What do you mean by chargers? these chargers can show up in the smart thing app?
When I said "the one on the charger shows up", I meant that the watch, which is on the charger, shows up.