This feature was spotted in testing a while ago on iOS [https://www.socialmediatoday.com/news/facebook-once-again-experiments-with-up-and-down-votes-for-comments-to-opti/588340/] . This time it is being tested on Android devices in Brazil. Besides
Facebook for Android is adding a Recently Viewed section to Marketplace along with a slight redesign for its selling tab
Facebook keeps improving its Marketplace section by adding more [https://www.testingcatalog.com/facebook-marketplace-allows-you-to-set-a-vacation-mode-to-notify-your-followers/] and more features. This time it is testing its Recently Viewed section where you supposed to
Along with the start of the Public Group experience beta testing [https://www.testingcatalog.com/facebook-starts-beta-testing-its-public-group-experience-with-selected-groups/] , group admins may notice a new design of the group admin panel on Android.