Have you encountered many/any box-and-whisker plots in the course of your work? On other dashboards?
I have only encountered them rarely.
What about histograms? A few.
If you have little or no prior experience with them, do you think they are easy to understand? Not really at first glance.
If not, can you think of some alternate ways to display distribution data? The bar graphs that have bars above & below a certain point (i.e. a median). Maybe scatter plots?