When combining tables in Excel there are several options.
Here I show you XLOOKUP, Power Query Merge and a Power Pivot relationship.
https://www.youtube.com/watch?v=KdF-OQ8G5FY&t=0s
In Power Query Editor, there is a button of “Keep Duplicates” in the ribbon. It’s located under Keep Rows in the section of Reduce Rows in the Home tab of the ribbon.
https://wmfexcel.com/2022/04/07/a-twist-to-turn-keep-duplicates-into-keep-unique-in-powerquery/