Late reply! apologies! As of my time seeing this, 5 days ago there was an outage on skyfeed apparently. So that particular issue could have been why. However, I'm noticing not all posts are showing still. It seems to be on their end. Will recheck settings to see if anything I can do rejump it. 😭

*Would like to add, if not all posts show, please check your account's "language" settings. If you have it set specifically to one language, it's very possible other posts won't appear until you add said language.

Steps:
Settings -> Languages -> Content Languages