I am currently working on creating a link between a Microsoft Form and a Sharepoint list, with a condition to directly update information in the custom SharePoint list if the Part Number in the new submission already exists in the list. I want to use SharePoint rather than the standard excel sheet that the Microsoft form defaults to.
This would allow entries for the same number to update the information in SharePoint rather than populating a brand-new row as it does in excel.
I have created my list, my form, and I have tried a couple custom flows in Power Automate. Each flow that I have created will run successfully, however, the list in SharePoint remains empty. I'm not sure if the issue is permissions based, or if my flow is incorrect. If this is something you could help with, I would be very grateful. I appreciate your time and consideration.
I'm able to get it to populate the sharepoint list when I run the "create items" action directly following the "get response details" action. However, when I attempt to add the condition to check the Part Number and "Update items" if it is a duplicate, or "create items" if it is unique, it "successfully" runs, but fails to either update a previous item or create a new item.
I tried switching the condition from using a filter query to this array filter as suggested in this previous post linked below, however this also failed in the same manner as my previous attempt.
https://powerusers.microsoft.com/t5/Building-Flows/Update-SharePoint-List-existing-line-item-from-form-entry-using/m-p/2060664#M227658
Below is my flow as it currently exists

@grantjenkins