And you can see in my photo that I’ve followed Dansup but his profile is still not showing any posts or even a profile picture.
His last post was 4 days ago so there hasn’t been anything new enough to send to you. Try following his Mastodon account, he uses it a lot more.
I also have several posts that predate my server in the global feed from accounts I have not followed.
Someone you followed may have boosted them, old posts will show up if the boost happens after you follow them.
IDK, how software fetches profile info is implementation dependent, so you’d have to dive into the source code or wait for him to post and see if you get it.