Could I get some clarification on the filters because I notice that the filter always defaults to recent activity but never shows me new posts only the most engaged posts. Since I engage with every post, I get notifications when someone comments on older posts but never new ones.

Is there a way I can change my default filters, or turn on all notifications for a group (as admin or reg member) without having to filter to newest posts everytime?

I find myself never using recent activity because it is never new or "relevant" content.