You pull your GPG key from offline backups, reset the applet and load it again. The same Gpg key can be used for SSH too. You can generate keys inside Yubikey

You pull your GPG key from offline backups, reset the applet and load it again. The same Gpg key can be used for SSH too. You can generate keys inside Yubikey, but you also have the option of bring your own key, which surely you keep safe offline.