Accessing 1Password on a new device

The 2fa code is asked every time you sign in to a new device after installation. So if you activate 2fa for 1Password, you need to add the 1Password mfa QR code to your emergency kit. I printed both, so I scan the code from paper to any independent authenticator app in case I lose access to every device.

In case I'm on on vacation and lose my phone, I would ask myself if I really need to access my accounts from remote for the rest of the vacation. It might be sufficient to just buy a new cheap phone and some prepaid SIM card with internet access to get general internet and general telephone access. I would create a fresh and temporary Google account for the cheap android phone. Usually, that's enough phone for vacation.

If you have someone at home with access to your 1Password account, you could install Whatsapp on your replacement phone and ask him or her to send you your credentials including the mfa secret used for 1Password, if he or she has access to it. Whatsapp chat is end-to-end encrypted, so sending this via private chat is secure enough I assume. Don't do this via email, email isn't secure enough. If you have the secret, enter it into a standalone authenticator all such as Google Authenticator, so you get the TOTP code.