Wsgiref Asynchronous?

Below I have described a program that aims to serve asynchronous http requests using the wsgiref module with a simple implementation to make it ( asgiref ) :

# Native Module : asyncio — Asynchronous I/O ->
import asyncio, inspect, threading, time
# Native Module : wsgiref.simple_server -> ( )
from wsgiref.simple_server import make_server

# Syntax Objective -> convert function to coroutine and be able to run concurrently ( asynchronous )
async def asgiref(environ, start_response, loop):

    await asyncio.sleep(0.01)

    status = '200 OK'  # HTTP Status
    headers = [('Content-type', 'text/plain; charset=utf-8')]  # HTTP Headers
    start_response(status, headers)

    # The returned object is going to be printed
    return [str(f'Thread Main: {threading.active_count()}, Thread Id: {threading.get_ident()}, Thread Time: Processed in {time.thread_time()} (seconds), Event Loop: {loop}.').encode('utf-8')]

def wsginter(environ, start_response):

    # Syntax Objective -> capture the current event loop, but it doesn't exist ?
    # asyncio will create a new event loop and set it to current.
    loop = asyncio.get_event_loop()
    # Syntax Objective -> run until it terminate the loop and trigger the coroutine :
    return loop.run_until_complete(asgiref(environ, start_response, loop))

# Syntax Objective -> start the test server and trigger the function intermediary to wsgiref
with make_server('', 8000, wsginter) as httpd:

    print(f'Serving on port 8000...')
    # Serve until process is killed

( ☉☉ ) → The code above works, but how can I know if it’s really asynchronous (would I be able to capture the secondary thread and know if it’s running?), because on the main thread I got it, through the function ( get_ident() ) of the class ( threading ) , as above. And what would be the reason for the error ( Deprecation Warning: There is no current event loop, as it is understood that the loop does not exist, but is captured through the loop object ) ?