I understand async/await as I'm conversant with NodeJs. When you mentioned asyncio, I assumed it be something specific in the Python library.
In case of Ruby, I've found these libraries (ruby gems) to be very useful.
1. Sidekiq - https://github.com/mperham/sidekiq
2. RocketJob - https://github.com/rocketjob/rocketjob
What I'm guessing you're saying is that this kind of behavior is available natively in Python, whereas in Ruby, it is achieved by some roundabout fashion.