I see options for multi and unicast, but no broadcast.
I see Performance Analysis Dashboard information for VMAN and SAM and NCM, but not for NPM--which is where you placed this query. I'd like to see what you're seeing and find the limitations you've found.
I found a link about some limitations, but I'm not sure it references what you're mentioning: Unsupported data in Performance Analysis dashboards - SolarWinds Worldwide, LLC. Help and Support
Would you mind pasting in a screen shot of what you're seeing, and where you envision the broadcast option should go? And also share with us the version of Orion Products you're hoping to see broadcast options in?
As far as i know, broadcast monitoring is not enabled by default @ NPM.
Depends on your device MIB, you can try to create a UnDP to get broadcasts and then you can display it on a custom view.
Regarding PerfStack, unfortunately Im not sure you can view broadcasts there even if you created UnDP for it.
In the interface traffic drop down it has options for tracking uni and multicasts, I imagine this is where broadcasts would be if it was available.