Yeah, the fundamental difficulty is LNURL needs you to control a clearnet domain somewhere so it's easy for people to fnd you and resolve a human redable ID like `satoshi@lightning.gmx.com` -> long LNURL pay thingy `LNURLPBLAHBLAHBLAH.....` -> An actual Invoice from the Lightning Network.

That need to start with a clearnet domain makes it difficult to get working at all from an Umbrel-at-home, and difficult to make it work reliably. I assume it would work over Tor, but 99% of people then probably can't pay you as running Tor on a phone is not normal 😅 and also a tad difficult