2-factor authentication codes via SMS are pretty common and don't require a smart phone. You haven't run into this before?
But this might not really have been a 2FA case - I mean, I was physically sitting in the bank.
Etc. etc.
Genuinely no idea why you’re not considering this.
Also, the thought that we as a married couple are not an entity is strange to me, but I guess that's the modern way of thinking, and I am old.