Proton on Nostr: Yes, recovery addresses are only kept as long as they are needed by the owner of the ...

Yes, recovery addresses are only kept as long as they are needed by the owner of the account - as soon as you remove it from your account, it's removed from our systems too. You can also replace it with a different recovery method: https://proton.me/support/set-account-recovery-methods

You can learn what is and is not encrypted here: https://proton.me/support/proton-mail-encryption-explained

Regarding IP logging, you can find the details here: https://proton.me/legal/privacy (they are not logged by default)