Two-Factor Authentication (2FA) in Innovator - what options do we have in 2025?

Hi community,

title already sums up the question. What options do we have for two-factor authentication in Innovator? I assume Innovator in an Azure cloud or similar can do it. But what options do we have for regular non-cloud instances?

I know that additional authentication modes are available for subscribers. But I am not much into this topic.
Does anyone know more?