We could potentially create a pull request to add the Cotech group to cooperatives.yml file (using the GitLab group name, cotech, for the login) if we wanted and also other co-operatives hosting public code on git.coop could do the same.
Looking at the list of co-ops on coophub.io, all are from the Americas apart form Webarchitects and Camplight, there must be some other CoTech co-ops with some public GitHub / GitLab / git.coop repos that you can share?
It is simple to add your co-op, fork the repo, add some metadata and open a pull request