IDEA: Add vertical rule to right of any column in table or matrix

I have Free PBI Desktop v2.105 (64 bit free version May 2022) on Windows 10.

We are converting old reports that were created via Perl and written to Excel spreadsheets to Power BI. One of our requirements is the managers want to save the reports as an Excel spreadsheet. Some reports require a rule between groups of columns as some reports can have 22 columns (we would print it on 11x17 paper in landscape with a smaller font).

Unfortunately I am unable to paste an image from the clipboard here, or drag and drop an image here. On other Microsoft PBI forums I can paste an image from the clipboard but not here. I'm using the latest Google Chrome browser. Here's an external link to the screenshot: https://ibb.co/kSK7byd

We would like to be able to control the rule type (solid line, dotted line, dashed line, etc), rule thickness, and line color of the vertical rule.

Thank you! Have a safe and wonderful week!