Comments don't show on all blog post

I’m currently using the Sydney theme. My blog is only showing the a comment box on one of my post but not the rest. I tried to see if i disabled something by accident but i didn’t find anything. Any ideas on how to fix it?

This post has a comment area

These don’t

Hello @naybesa,

Please check this WordPress Codex page:

Please feel free to ask any other questions that you might have.

Kind Regards, Roman.