Updating SharePoint List from Excel

I've used Flow to do this before as on selected item in a doc library and scheduled. You can use Get Rows from Excel if you store the file in a doc library or OneDrive and then add a create item in SharePoint. The Excel get rows has a 500 row limit so I used a loop to get batches of 500 and change the start row in the Get Row action based on a variable. You'll need to use a date or flag column in the spreadsheet to track which ones have been done and update it in the loop