The like button - and like count - are only removed from topics in categories where you have voting enabled. Topics in categories where you don’t have voting enabled are not affected.
If you’d still like to show the like button and count in topics in categories that have voting enabled then try to add the following to your theme in the common CSS tab:
.topic-post.voting-post button {
&.like-count,
&.toggle-like {
display: block;
}
}