How do I get repeating part numbers (data) to auto fill data.

Sorry I am not very Excel savy but I was tasked with filling a spreadsheet with data of our part numbers, their description, the supplier we get them from, our assigned supplier numbers, and our suppliers part number for kits we make in our company, there are over 9000 but I have noticed that there are a lot of repeating part numbers so I was hoping there was a way so that I could have that data auto fill.

I can post a link to the document it does not have any proprietary data that I can see.

https://gpcompinc-my.sharepoint.com/:x:/g/personal/zachv_gpcompanies_com/IQAYSdPfHYQvRp6TRW4hg_xjAYh_4Jjl2Z_aCXX_64zMf50?e=MKDtrR