This is intentional. We don’t show posts categorized as help or project feedback, because if we did, they would be all you’d see in the newsfeed. There are so many of these, and they aren’t really relevant to a typical visitor - only to a contributor who’s going out of their way to provide help or feedback.
Both of these categories are accessed directly from our https://www.freecodecamp.org/contribute page, and with a special flag that shows unanswered posts in reverse chronological order.
We don’t show updates to the guides in the newsfeed because these are accessed through the “hint” button and updates to these would also be uninteresting to most campers.
By the way, there is an option on the categories called “supress from newsfeed”, and that is how we’re hiding these categories from the newsfeed.