ID.me supports WebAuthn (or maybe U2F? In this context it doesn't matter) but importantly it does identity verification so it can determine whether I am a US citizen, whether I'm a tax payer, and if so which one.
Now, perhaps the US Federal Government should own the capability to do that instead of a private company. But, so far as I can tell, they do not and login.gov is not such a thing.
https://www.theverge.com/2022/1/26/22903437/id-me-facial-rec...
Login.gov also supports WebAuthn.