I joined a mailing list recently that discusses tech coops: https://npogroups.org/lists/info/tech-coop Some interesting discussion.
I found a repo with a lot of information and companies here: https://github.com/hng/tech-coops
It's really unclear to me how you would go about joining an existing studio like this. At least in North America, there are so few, I think the answer is to start one yourself.