Allowing to search for your posts/ your comments / add Activity overview

Adding a way to track posts, where you have commented or created, as it is tedious to check every post now and then and maybe even forget, that you have commented the very same post already.

Allowing to search for names of people in the search might be a first step (results would show all activity connected to that name in chronological order)

A tab, in which you can see your activity (your posted/commented content) would be on top, but I guess this would need some kind of login?