Blazor Client (WASM) projects do not support database scaffolding as the browser does not have database support.
A blazor client would typically use oauth, and the login server project would be the one to support identity database scaffolding. That is the clamor client would call a login server and get a JWT token, that it passed as a bearer token when calling a webapi.
Note. If you used cookie authentication, the the host of the index.html static file would implement cookie authentication.