Hi ahhhmed, good day!
Here's a formula you can use to extract unique values. It does not sort them, and it does not handle blanks in the list elegantly:
=INDEX($A$2:$A$11,MATCH(0,COUNTIF(B$2:B2,$A$2:$A$11),0))
It assumes your list is in Column A, ranging from A2:A11, and your unique values...