No problem here ..
I renamed my temp to force Sign in with SF 6211 and after enter mail + pass,
I get the OTP (sample) at my trusted Apple Device (iPad via WLAN)
and that with an account in another (cheaper) country without being connected from there
Login outside SF -with regular browser- works ?
If this works try to rename SF cache (if SF closed) - like here
btw: Stream Apple TV+’s library for free from January 3-5