I can ssh (of course) with my ssh key, and now I can sign Git commits with it. Can I also use an ssh key for encryption? My keys are all ed25519 if that helps. I see a few proofs of concept on the web, but nothing as easy* as gpg.

My only use case for gpg asymmetric encryption is encrypting my offsite backups, and various small things. In other words, I encrypt only to myself, and I like asymmetric encryption because I can keep the private key offline.

*that word is used ironically. gnupg is the devil I know, so I don't mind it much these days, but I'd love to migrate off it completely.