Chart Element help with Formatting Numbers

Hello Bubblers, I need some help if possible, I am trying to format the numbers in a chart, but it is not possible; I want to shorten the number since I am working with Millions, and reding this length is not helpful. I wish to convert them to something like 3,4M instead of 3400000. I tried countable pluging and several options and couldn’t make it, even the basic to add a thousand separators, and I get the red sign in the editor.
I saw the forum in numbers formating, but it seems it works differently in the chart element.

I share the images:


Chart 2

Did you ever get an answer on this? Having the same issue and unable to find any guidance on formatting axis in $ks or $ms