Server-Sent Events with Lambda Response Streaming and function URL possible?

[Ic-ks]

Hi,
I tried several experiments to get a simple Micronaut application with an endpoint running which delivers a couple of strings, where each string is delayed by 1sec (implemented as Publisher<Event<String>>). Locally, it was possible with the netty dependency in place. Deployed as GraalVM lambda with a gateway the response was buffered and all strings were returned at once. After some research I discovered that this buffering is the intended behavior of the gateway.
Further research brought me to the announcement that AWS Lambda Function URL supports response streaming: https://aws.amazon.com/blogs/compute/introducing-aws-lambda-response-streaming/
Response streaming should work in combination with a custom runtime. So in theory there should be no problem to get SSE running. Unfortunately I did not find a solution. I even tried an own implementation of AbstractMicronautLambdaRuntime and RequestStreamHandler because the function URL uses gateway V2 events. So is there any deeper documentation regarding this problem or even better a working solution?

Best regards and thanks!