In Microsoft Power BI Desktop it’s not obviously how to write a Number as it is without modifications like to write ‘2k’ instead of ‘2023’. Truth be told, it took me approximately 5 minutes to do it.

I use the version 2.122.1066.0 64-bit (October 2023), in previous versions the the way to display a nit was implemented in another way.

In this version of Microsoft Power BI Desktop widget settings to select the display value format are in the tab “Visualizations > Format your Visual > Visual > Callout > Values”.

Format Number in Microsoft Power BI Desktop Widget

Of course, it's not only about how to write a number as it is. But here you can choose the option which you need and not to hope for the best from Auto format.