They can receive, just can't buy or sell it without I think. I can test this with a friend later today.
You sending the sats, is the prompt for them to turn it on? Lol
Discussion
I’ll look into it. Where I live, nostr:npub1cashappn03s3cl2ljsdntv0v28e2um5lgx4vjctqjt23pcwzjhsqmtdg5l has Lightning disabled, but you can send sats internally between users and use on-chain transactions.