Azure B2B SharePoint Integration

I've followed the steps outlined here for enabling Azure B2B integration with SharePoint & OneDrive: Azure AD B2B integration for SharePoint & OneDrive - SharePoint in Microsoft 365 | Microsoft Docs

It has enabled successfully however there appears to be no difference when sharing from SharePoint and users aren't being added as Guests in Azure AD.

Other steps I've tried:

1. Enable OTP in External Identities

2. Create User flow in External Identities to allow Azure sign up and OTP. 

Has anyone else had luck configuring this that can provide any futher guidance? Thanks.