I'm using PowerApps to modify a list (list A) in Sharepoint. Some of the data displayed in this list is from another list (list B), displayed using lookup. Every week I update list B, with data I get from a automated email. The email contain a excel spreadsheet.
I would like to automate this, but I've run into so many issues I'm not even sure it is possible anymore.
This is my flow:

To my knowledge, it isn't possible to update a list directly from a excel file, unless the excel file is formatted as a table. Instead I have a empty file on my sharepoint that I update, which I later try to use as the source for updating list B.
Sadly this file is either locked by myself, or it won't recognize my table.
Any solutions to solve this problem would be helpful!

