You authenticate to a cloud escrow provider using any of your account's other associated devices. If you have none, because Yellowstone erupted while you were a

You authenticate to a cloud escrow provider using any of your account's other associated devices. If you have none, because Yellowstone erupted while you were away, and someone also yoinked your phone in the ensuing chaos, then you input either (A) your device's passcode and an SMS code, or (B) a recovery key. If you have neither, then you use an established recovery contact. If those steps didn't work, then it's not too late to visit Wyoming.