Important

• Starting in the second half of 2021, Google is deprecating web-view sign-in support. If you’re using Google federation for B2B invitations or Azure AD B2C, or if you're using self-service sign-up with Gmail, Google Gmail users won't be able to sign in if your apps authenticate users with an embedded web-view. Learn more.
  
  
• Starting October 2021, Microsoft will no longer support the redemption of invitations by creating unmanaged Azure AD accounts and tenants for B2B collaboration scenarios. In preparation, we encourage customers to opt into email one-time passcode authentication. We welcome your feedback on this public preview feature and are excited to create even more ways to collaborate.

Read More

Add Google as an identity provider for B2B - Azure AD | Microsoft Docs

Google Developers Information

Google Developers Blog: Modernizing OAuth interactions in Native Apps for Better Usability and Security (googleblog.com)