I just opened Tor Browser, went to nostrudel.ninja and accessed my own relay through Tor, seems to work fine here? There are some people hosting clients on tor as well:

GitHub

GitHub - 0xtrr/onion-service-nostr-clients: A list of nostr clients exposed as onion services

A list of nostr clients exposed as onion services. Contribute to 0xtrr/onion-service-nostr-clients development by creating an account on GitHub.