I don't mean to laugh.
Questions on the asknostr hashtag should always be taken kindly and seriously.
It just reminded me of a meme that answers a related question:
"can you delete on Nostr?"
Discussion
I get that, but you can request a deletion and relays will respect that request. So there is a delete and in practice it works.
What I'm asking is if there is an undelete once the request for deletion worked in practice.