Safari's TOTP implementation in version 15 is pretty cool, though more websites need to adapt to make it truly useful.

Just installed Monterey on my MBP and am giving the new Safari two-factor authentication magic a whirl. So far, mixed results for autofill from websites, but it’s early. Where it does work, it’s phenomenal.

This post by Dan Moren from Six Colors helps you migrate Authy two-factor codes to Safari. it is a little tedious, and depending on how your Authy is set up, it may require a little trial and error, but it works – a massive timesaver especially since I don’t plan on additional migrations to Monterey or iOS 15 for a while yet.