Generate Row number to excel table once a new row is added to the table using power automate

[MReeves6]

I have created a form, where once a response is submitted it adds a row onto a table.  What I would like is that once a new row is submitted that the row number be inputted in a column. I am even ok with it generating a unique id instead of the row number. I have tried using the following function for lists, but it does not work... The Request ID is what I am trying to have populate once a request is submitted. I even tried creating a list on a sharepoint, but it is not working.  One of the work arounds that I was doing was to have the row be filled in excel, and then have that information populate a new row on my sharepoint list, but it still didnt work. Your help please