Hi @Anonymous ,
Actually, the Leave request you submitted through this template app is not stored within the Excel table in your OneDrive folder. Instead, the Leave request you submitted would be saved into the LeaveCollection collection within this app.
If you want to save your Leave request into a Excel table instead of the collection, you need to create your own Excel table in your cloud service (e.g. OneDrive), and your Excel table must contain the following columns:
Title
Detail
StartDate
EndDate
LeaveType
Approver
Status
Requester
LeaveID
then within your app, create a connection to the new created Excel table.
Please check the solution I provided within the following thread for more details:
https://powerusers.microsoft.com/t5/General-Discussion/Power-App-Template-Leave-Request-integration-into-Excel-OneDrive/m-p/266637
Please take a try with above solution, then check if the issue is solved. If you have solved your problem, please go ahead to click "Accept as Solution" to identify this thread has been solved.
Best regards,