Question: When will a comment you made on the Fediverse not show up on your user page?

I've noticed recently that a couple comments I made don't show up in my user page. If someone responds to my comment I can get to it through the notifications page, otherwise, I have no way to find/see it.

The message I can see through responses I can see was posted on to lemmygrad.ml, but I only ever use my lemmy.world account, so I assume the reason it doesn't show up on my user page has something to do with federation, but I just made a post that shows it was posted on lemmy.ml but it shows up on my user page. Is there any way to know when a post you're making might not show up on your user page?