Do we have a ALB + lambda (Fastapi) with server sent event (streaming response) Example?

[GxWwT]

from fastapi.responses import StreamingResponse

@app.post(.......):
return StreamingResponse(
content=model.chat_stream(chat_request), media_type="text/event-stream"
)

[GxWwT]

If I set env:
AWS_LWA_INVOKE_MODE: response_stream
then no any response from application load balancer (only receive 200 response).