Docs: OpenID Connect | Login.gov
They use a standard OAuth2 Structure with the addition of (1) query string parameter for Authentication Assurance Level (AAL1 or AAL2) “acr_values”. Would be nice to wrap the Auth0 React/Auth0.js libraries and enable this identity provider as the government moves to the cloud and custom application development becomes an increasing need for government agencies.
As a community member and avid user of all things Auth0 I can support this effort in any scope and scale Auth0 needs help on. Just need the invite.