Hey,
In some categories we have the Like button for posts and comments,
in other categories and their nested sub-categories, the Like button only shows up for comments.
I’m looking for the setting that controls this but can’t find anything.
Would love your help!
Thanks.
Hello and welcome @Anat_Srulovitch 
I’m afraid I don’t know what that could be? Do you have a link to your site you could share, or maybe a screenshot? Is it possible that it’s a plugin or theme component that’s affecting when they show up?
Maybe try safe mode.
Do you use Discourse Topic Voting in that categories? There is a describtion in the plugin topic how to enable likes on first posts in that case.