I checked NGINX Unit documentation for deploying FastAPI and Django Channels. They did not use any ASGI like Uvicorn, Hypercorn, Daphne. Their configuration page also did not mention anything about using these servers.
Updates to NGINX Unit for Autumn 2020 says:
now, you can run ASGI apps, use multithreaded request processing with applications, and include regular expressions in your configuration!
However, FastAPI Documentation and Django Channels Documentation suggest using Uvicorn, Hypercorn, Daphne.
What is the reality here?