not sure where to put this ticket, I added it to the group permission community plugin too.
The issue in Matomo is the following one, if you want to copy a dashboard to a user, you need to do it for each single user of your instance.
It would be interesting to copy it to a group also, for example the marketing department group so that you won't need to add 10 users to copy the dashboard to.
Hope that helps,
If this is solved, then I think resolution of #19371 could be solved easily...