Extract data from Excel spreadsheets
This prompt assumes that for each item in the board, there is a configured SharePoint folder for that item.
Sidekick prompt
Read any Excel spreadsheets in the SharePoint folder configured for this item.
Sidekick lists the spreadsheets found:

We can the ask for a preview of the data in one of the spreadsheets:
Preview the data from the "Project-Management-Sample-Data.xlsx" spreadsheet
And only display specific data from the spreadsheet:
Filter the data in the spreadsheet to only show rows from "Sales" and "Marketing" projects

And then import just the data we need from the spreadsheet into the monday.com board:
Import the filtered data from the "Project-Management-Sample-Data.xlsx" spreadsheet into the board
Only import data for projects "Marketing" and "Sales"
Add each row with task name as the item name in the group "Tasks".
Add appropriate columns
Add the "Project Name" column from the spreadsheet as a dropdown column, populating it with each of the project names
For the "Assigned to" column, just use a text field as those people are not currently in monday.com
Add a status column and populate the dropdowns based on the percentages in the "Progress" column

The data is imported:

How it works
Here’s a walkthrough video to show how the feature works:
https://www.youtube.com/watch?v=Jp-nvs-DbxoLimitations
Please note: At the moment, this prompt will only retrieve the 5 most recent spreadsheets from SharePoint. This is to prevent unnecessary load on the system.