Putting this here to solve this issue. Still new to Lemmy, but I'm sure this one is solvable.

Posted a comment on this post: https://lemmy.ml/post/1206080

Check the same post on this instance: https://lemmyfly.org/post/1983

Now my comment is the only one in the thread.

I think this has something to do with the language. My comment has the 'English' marking after the Fediverse icon. All the other comments do not have this.

Could this be something where this instance blocks comments with an undetermined language?