Not sure about the other stuff, but SMS 2FA is generally frowned upon for auth.. though obviously they've decided it's fine for the one time setup just as a ver

Not sure about the other stuff, but SMS 2FA is generally frowned upon for auth.. though obviously they've decided it's fine for the one time setup just as a verification on signup (not used as 2fa in that case, more like crude proof of identity). U2F has been a challenge for everyone from what I've seen.