you can send from the primal wallet but cannot receive to a lightning address.
I would recommend getting in touch with primal on Nostr or elsewhere and asking how to set this up. I unfortunately don't remember how I did it!
Discussion
Worked it out! I was assigned a name which turns out was the lightning address, although that didn’t seem clear at the time, I thought it was a user name but I’d already registered one elsewhere! Everyday a learning day…