Am I understanding the behavior of the Uvicorn worker correctly?

[parkilwoo]

hello. I am currently running a FastAPI application via Uvicorn worker.

I would like to know if my understanding of the behavior of Uvicorn worker is correct.

If you run a single Uvicorn worker, you can use the
One process and a main thread are created, and the main thread manages the event loop.

All requests (functions to be executed) are stacked in order in the event loop and queued in order.
If a request is defined as async, the event loop treats that action as asynchronous.
If the request is defined as def, the event loop creates a thread to handle the task as multithreaded, and the event loop proceeds to the next task in the queue.

That's how I understand it, is there anything I'm misunderstanding?