Building explorer in ArcGIS Scene Viewer

[MCh]

How could I use this Building explorer inside the web app?

I create Building Scene Layer Package (.slpk) from ArcGIS Pro and add into ArcGIS Online.
When I open the model in Scene Viewer, it has widget call 'Building Explorer' and can filter the building floors.

But, when I add this scene into web app like Experience Builder
there is no 'Building Explorer' or any widget that can filter floors at all!

So, what's the point in making 3D model/BIM into .slpk??
It seems like .slpk can do nothing other than visualization. (can't do even just filter the floors...)