ArcGIS Pro is still in the process of increasing it's toolset, that's an optimistic outlook, others have had similar questions in other forums, Where is the classification histogram? and ArcGIS Pro - histograms within graduated colour symbology.
Currently, to access Histogram and Statistics information your best option is to you the Histogram and Statistics Function
The Statistics and Histogram function is used to define the statistics and histogram of a raster. You can insert this function at the end of the processing template to describe the statistics and histogram of the processing. This may be needed to control the default display of the processing result, especially when defining a processing template that contains many functions.
You could also make a scatter plot using this approach from Esri's documentation
Use scatter plots to visualize the relationship between two numeric variables, where one variable is displayed on the x-axis, and the other variable is displayed on the y-axis. For each record, a point is plotted where the two variables intersect in the chart. When the resulting points form a nonrandom structure, a relationship exists between the two variables.
Also, in general you can see which tool are not available for ArcGIS Pro