Vault oidc google workspace iam groups

I am struggling to find information to understand how to configure and verify group information for workspace users. I can see authentication works, but not sure how to validate what Vault is receiving for groups from google. I followed late 2020 discussions on this subject and found the updated section for google specifics OIDC Provider Setup - Auth Methods | Vault by HashiCorp ( I even see the bug report and the bug report for the documentation. I just done see how the groups fit into vault.
I am hoping for more guidance since I am new to integrating vault, OIDC and google. Appreciate direction and guidance.