Is there a way to search for duplicates in sheets?
You may use helper column to filter duplicates/unique values. If you are on Excel 365 you may use =COUNTIFS(range, range), if not =COUNTIFS(range, cell) and Ctrl+D it down. Values >1 in this column indicate duplicates, use filter on all but 1.
How do I filter duplicates in a spreadsheet?
How do I find duplicate names in Excel?