A statis address by which you can receive to a LN wallet = a Lightning Address. Under the hood, this takes care of LNURL as well, more specifically LNURL-pay (so others can pay to your address).

You can see how it works here https://github.com/andrerfneves/lightning-address#tldr

A simple way to make a LN address which will receive directly to your umbrel is https://sats.rs

Let me know if that works.