Oqtane
The Oqtane Framework (https://github.com/oqtane/oqtane.framework) contains a full Blazor UI implementation for .NET Identity. This was done to enable a seamless native client-side SPA UI experience consistently throughout the framework. The components are designed to work on Blazor Server, WebAssembly, and Hybrid hosting models and implement all of the .NET Identity functionality (login, logout, password reset, 2FA, etc...). In addition, the framework uses a BFF architecture and contains support for OAuth2/OIDC identity providers for authentication (without the use of any 3rd party libraries). The framework also supports multi-tenancy with both isolated or shared data options... and supports SQL Server, SQLite, PostgreSQL, and mySQL data stores.
https://www.oqtane.org/blog/!/39/backend-for-frontend-bff-architecture
