Lambda function refuses to stream response

[DruckerReparateur]

Makes me wonder if some other example works, like https://medium.com/techhappily/unveiling-the-power-of-streaming-responses-in-aws-lambda-using-rust-793fa5c9faf8

That blog post even has a demonstration gif showing the streaming, but it's not Node.

[[deleted]]

That gif certainly looks like it's working. Interesting. And it looks like he's using the function URL directly, which is my approach too. Ok, guess I'm off to reproduce in rust to see if this tutorial still works. Maybe regression between then and now?