hmm⊠
I think âactivityâ is more like
https://your.domain/search?q=group%3Acamille.
here there is an intersection with category%3Acamille and filtering of what group members might have posted elsewhere.
and even stronger (Iâm discovering new things every day 
), but you need the category_id
https://your.domain/g/camille/activity/posts?category_id=xxx
filters whatâs needed, I suppose it should be relatively âsimpleâ 
to automate this filter on the activity tab, although⊠you still have to specify which category should be displayed for each groupâŠ