Hello @rwollner
Thank you for contacting the Canvas Community. We're sorry to hear you've been experiencing issues with analytics for groups. Unfortunately, there are no course or admin analytics for groups that were setup within courses although we understand the need and desire to have that option available.
Here is the Canvas guide:
https://community.canvaslms.com/t5/Admin-Guide/How-do-I-view-account-analytics/ta-p/165
There may be an option of setting this up with Google Analytics but that would need to be looked into further and not likely yet a built in feature:
https://community.canvaslms.com/t5/Canvas-Admin-Blog/How-to-Set-Up-Google-Analytics-for-Canvas/ba-p/...
This is a great idea however and there could be an option for groups integrated in the future. Feel free to check out our Ideas Conversation forum as we implement great ideas such as this that we find within the community.
https://community.canvaslms.com/t5/Idea-Conversations/idb-p/ideas