A Google search for a dynamic cohort manager Moodle plugin (https://www.google.com/search?client=firefox-b-d&q=moodle+plugin+dynamic+cohort+manager) turned up this link: https://moodle.org/plugins/tool_cohortmanager However that page says the plugin has either not bee published or is temporarily disabled.
I also found this article https://avetica.nl/2022/08/16/dynamic-cohort-manager/ describing the plugin, which would suggest that the plugin existed/was downloadable at some point in the past.
I'm hoping the plugin's developer / maintainer reads this forum, and if so could they please advise what happened, and whether there are plans to re-publish the plugin in future (and approximately when).
Thanks!