You can make an NPE for this also, and Make 3 integer attributes in that, Name of the 3 attributes can be,
( LowRisk_Count, ModerateRisk_Count, HighRisk_Count).
Now on the page where you want to show the data,
Put a dataview on the page and set its data source to Microflow, Now,
In the microflow, using retrieve activity, retrieve all the Risk which have LowRisk enum and then using aggregate list activity, count them,
You can refer to the image to know how to do it,
Now retrieve all three enums like this and count them, one by one,
Now use a create Object activity, create the NPE object you just, and set it’s attribute on the base of the count you just retrieved.
Let me know if you face any issues,
Hope it helps!!
Use list operation and take count and return the microflow like wise use for 3 enum and call the microflow to page