I don't know if it's an A/B test, but they no longer allow adding new TOTP authenticators for my family member's account. Existing setups continue to work fine.

I don't know if it's an A/B test, but they no longer allow adding new TOTP authenticators for my family member's account. Existing setups continue to work fine. That's why I had to do the hackery of having the script pretend to be the mobile app to set that up.