Ahh ok. I use Muun which is a lightning wallet and one of the options in the settings here. I copied an invoice address to the LN address section and saved it. Let me check if there is an email address. 👌
Discussion
The LN address will look like an email address, you'll usually find it in 'receive' part of your wallet.
It’s weird. It doesn’t exist as an email address only a QR code or alphabetised code. Maybe it’s the service I chose. I’ll try another one.