Hey @user281
Unfortunately, adding a new row to an Excel workbook isn't an available trigger for PowerAutomate. I'd recommend using a SharePoint list instead.
If you need to maintain your excel spreadsheet, you could develop a Microsoft Form that collects the required information and on submission updates the excel spreadsheet and triggers the email at the same time. Note that in order for power automate to work with the excel file, it needs to either be in SharePoint or OneDrive for Business.