OIDC and Windows Auth coexistence.

We have a deployment that we configured OIDC on and this is working as expected.
Now I have a use case for Windows Authentication for API endpoints. I am able to use Windows Auth properly when OIDC is disabled or Windows Auth is defined first. But Defining Windows Auth first breaks OIDC for the portal.

Is there a supported way for these two configurations to coexist?

We have PSU installed as a service and when OIDC is defined first I get a 401 unauthorized when trying to use the -UseDefaultCredentials parameter of Invoke-RestMethod against an API endpoint. I found reference to a header X-Windows-Auth but trying this did not change the result.