Ohh can we do the other way around, setting my BTCPay server LND node as lightning funding source on Alby Hub?
There is a Nostr plugin in BTCPay server, that enables setting up Alby Hub as your lightning funding source (via nostr:npub19hg5pj5qmd3teumh6ld7drfz49d65sw3n3d5jud8sgz27avkq5dqm7yv9p )
Ohh can we do the other way around, setting my BTCPay server LND node as lightning funding source on Alby Hub?
You can install Alby Hub as the interface to your LND node, but it's not straightforward