Пока новостей немного, почитайте о том, как делать аутентификацию в Blazor WebAssembly приложении при помощи AAD: https://bit.ly/3p1cEPE
Syncfusion Blogs
How to Authenticate a Blazor WebAssembly-Hosted App with Azure AD | Syncfusion Blogs
This blog provides the steps to authenticate a Blazor WebAssembly-hosted application with Azure AD (Active Directory) to secure the app from unauthorized access.