Hi @Anonymous,
Could you please share a screenshot of your flow's configuration?
Where does your excel file store?
Could you please show more details about your Excel file and Microsoft Forms/
I have created a Excel file and a Microsoft Forms on my side, the data structure of them as below:

I assume that each record in your Excel file has a unique ExecutorEmail, in addition, I assume your Excel file is stored in your OneDrive folder. If you want to update same row in your Excel file using data from your Microsoft Forms, I have made a test on my side and please take a try with the following workaround:
- Add a "When a new response is submitted" trigger, specify Form Id.
- Add a "Apply to each" action, input parameter set to output of the trigger.
- Within "Apply to each" action, add a "Get response details" action, specify Form Id and Response Id field set to Response Id dynamic content of the trigger.
Add a "Get rows" action, specify File name and Table name. Add a "Filter array" action, From set to output of the "Get rows" action, within condition box, left input box set to ExecutorEmail dynamic content of the "Get rows" action, right input box set to Executor dynamic content of the "Get response details" action. The add a "Condition", click "Edit in advanced mode", type the following formula:
@empty(body('Filter_array'))
Within "If/no" branch of Condition, add a "Apply to each 2" action, input parameter set to output of the "Filter array" action. Within "Apply to each 2" action, add a "Update row" action, specify File name and Table name. the Row id field set to following formula:
item()?['__PowerAppsId__']
Image reference:
The flow works successfully as below:
Best regards,
Kris