Or is there such function already exist?
Well, unfortunately, that particular function is not available. At least not in so far as "liked".
But, on each sub-forum Index page, there is a Filter (see Attachment 1) that will allow you to Sort by Last Message, First Message, Title, Replies, Views and First message reaction scores.
So, may be one of these Filters is what you are looking for?
Then, you also have the option to select in Descending or Ascending order.
But, if there is a thread that you really like, you can "Watch" , aka Follow it by clicking the Watch tab located above the first post.
Then, to view New posts, just click the New posts button at the top of the Main Index page.