ah, sorry. missed that detail
so on Umbrel if you use LND, then Alby Hub just uses your LND node.
It is basically a easy UI for your LND node.
So you opened a channel in Alby Hub (the UI), but your LND is the node that has this channel.
Alby Hub gives your LND node the powers to for example connect to the Alby lightning address, the extension, the mobile app, use zapping on nostr. etc.
