Google MDM- your apple account does not support the expected services on this device

[Kalyan803]

Problem: However, I am still encountering the error "Sign-in Failed: Your Apple ID does not support the expected services on this device" while trying to sign in to a work or school account from my personal iPhone to test Apple account driven user enrollment.

Cross Checked:

I ensured the domain name used is federated in Apple Business Manager, and accounts with this domain name can sign in to ABM as staff. Although ABM does not allow initial sign-in, it does recognize the account.
I am using GOOGLE MDM to enroll any iOS device to access company resources and have followed recommendation mentioned in this link https://support.google.com/a/answer/14011560?visit_id=638657816552106790-2323096194&p=enrollment-typ...
Well-known file is hosted on the domain and response is sept to Application/json

[Jasonw]

Did you ever get this resolved?  Im having the same issue.  Also wondering how you go about hosting the JSON file?