hi,
I think you mean something like group points on the map?
Like a group item clustering. When you click on a group point, only items of the specific group will be shown/become visible.
Check out this possibility, it’s about a group level zoom:
It’s about the function, to click on the group name in the panel on the right, in order to zoom to a group and activate the visibility. Not a group symbol on the map, but maybe helpful.
And here is a thread about clustering:
It doesn’t have something to do with grouping, but the mechanics of clustering are maybe similar.