Mine seems to be sorted by most recent for items with sufficient positive scores (seems like >10). If I scroll back far enough, then the feed continues with lower scored items (1-10) also reverse chronologically. Eventually that reaches as far back as my account age, then it starts over yet again with a different set of low positive score items (1-6), again going back a long time reverse chronologically. The net negative items never show up at all unless they are very recent, maybe less than one week old.
Are you saying that’s not the intentional design when looking at your own profile feed?
I don’t have enough volume in my history on other instances to make a reasonable comparison.