RTMP being an insecure unencrypted protocol, suffers from attacks like MITM and network sniffing. Naturally so, FB uses RTMPS: https://ppc.land/streaming-facebook-moves-live-videos-completely-to-rtmps/
Why is Google lackluster about adopting this secure approach? Is it due to less compatibility for the RTMPS protocol with streaming software and providers?
Azure does not provide RTMPS, at least their official developer doc does not mention that.