Hello 1. There are three voting elements there: Vote (Like), Reaction and Vote (Up/Down). For now Reaction is used by default.
2. Voting elements use so-called 'objects' which are needed to generate the whole voting element including Icon, TItle, Voting popup and so on. Unfortunately, in case of voting objects there is no way to add/remove title via Studio -> Navigation builder.
It will require to develop a new custom template with the change template/menu_custom_hor.html file and the redeclared methods like getMenuItems from template/scripts/BxBaseMenu.php parent class. More details youmay also find here https://github.com/unaio/una/wiki/Menus