On pc you do not need any minimum balance to verify or connect uphold just connect it, the rewards will be transferred right away (if present in brave wallet)
But make sure uphold only has 4 slots so if you even disconnect your uphold from this browser your one slot still be in use means next time you’ll be able to connect only 3 brave wallets with uphold.
You can vote here so developers can bring backup feature :-
Right now there are two options left either connect your uphold account (only 3 slots will be left) or tip all of your bats to your publisher account (not recommended by brave)