Question about Facebook new feature

Today is the day I noticed that Facebook has Upvote and Downvote features for comments on some groups.
On most of them, I only see the usual buttons "Like/Reply/Share".

So my question is: how does this feature affect anything on Facebook? Does it work like on Reddit or Quora?

with new features. FB will update it on each region first to test user response. so maybe your region is not on the test list