How to disable WebSocket fallback in .NET 9 Blazor App project?

[KieranDevvs]

Ive created a new Blazor app from the VS templates in .NET 9 (render mode WASM) and the behaviour out of the box is that if the client doesn't have the WASM binaries then it will initially fallback to a WebSocket connection, download the binaries in the background and then switch the rendering over to the client.

I don't want this behaviour but I do want to use .NET 9 features for things like DI constructor injection.
How do I serve just the static WASM files (without a websocket/signalR fallback) and show the user a loading indicator as previously done?

Thanks,
Kieran.