This is a great idea and itd be a nice feature and to prevent spam only people in ur screen can see someones dice roll a previous game i played has this option and can also be used as a gambling system(which is a double edged sword because people scammed numerous times when people bet but can be fun if a trusted person holds the money) it can also be used to roll for loot drops if exploring with someone
Example: while exploring with party members of different tribes we find an expensive book so to decide who keeps it whoever rolled the highest dice keeps it. But that will have to come with trust which can be hard to find in a sandbox especially when exploring with new people you just met to get further in UW that a regular low level player couldnt achieve alone.