uniqueness doesn't exist.
It does, it's just an extremely rare quality like genius. Sure all people are 'unique' in terms of biology, a very small percentage are really unique or absolutely deviant from the 'mainstream' etc.
I don't mean like being able to sing or speak french, I mean being able to see visual or audio impulses as shapes and structures in your head, being able to speed-read and memorize the text with astounding accuracy,
people who instantly see clear solutions to difficult problems, people who invent new techologies and extremely complex source codes, can extremely accurately read physical states and emotions of people by their body signals/expressions/tone etc, people who process math instantly in a split second
The word unique is very overused. A lot of people can have 'interesting' skills like making people laugh. Those are not unique. You are very unlikely to meet many truly 'unique' people, when you do you're lucky though. They are maybe less than 1% of the general population. But unique people can make for really intriguing friends if you ever come across them.