Hi DenSingh,
Based on the screenshot you have shared the column name in the excel file have blank spaces between the text. So, only 1 column Thor is matching. Try to do bootstrap after removing spaces from column headers in excel as below.
1. ClientName
2. Thor
3. BidProjectCode
4. DealQualificationStatus
5. DealStatus
6. RequestDate
Also, refer the below link to get more idea about bootstrap.
https://success.outsystems.com/Documentation/10/Developing_an_Application/Use_Data/Bootstrap_an_Entity_Using_an_Excel_File
Thanks & Kind Regards,
Sachin