By default, this asyncio.start_server() method will create a list of socket objects usually for both IPv4 and IPv6 (if possible) and do not set keepalive option. if I want I can create a socket object by myself and set keepalive option for it, then pass it in start_server(), but if so, I will not be able to start a server which listens on both IPv4 and IPv6 addresses.
I hope we can add a keepalive parameter for asyncio.start_server() or do something else to make things easier.

Linked PRs

• gh-101336: Add keep_alive keyword parameter for AbstractEventLoop.create_server() and BaseEventLoop.create_server() #112485