I haven't use Python multiprocessing packages, so I need to ask, how does one do flexible work queues with them?

I mean a situation like where in threaded context there would be code like:

    def determine_quest_latency(quest_name: str) -> int:
        return other_thread.wait_sync_job(lambda context: context.ping_quest(quest_name))

..without needing to provide a protocol that covers each possible scenario the client might wish to execute in the process?

I believe the answer is "you don't", but passing functions in messages is a highly convenient way to structure code in a way that local decisions can stay local, instead of being interspersed around the codebase.