@TotalSonic I think it was never maintained by Canonical.
If I am not mistaken, uAppExplorer was created by Brian which had the UT apps from the then Ubuntu Store and snaps. And during the transition to UBports, Brian created OpenStore and transitioned all UT apps to it so if anyone is specifically looking for UT apps then OpenStore is the way to go
Is Brian still keeping uApp Explorer going to provide snaps? Or will https://snapcraft.io remain the only real place for snaps?