Convert StaticMesh to ProceduralFoliageVolume (UE 5.1)

Hi,
I’m relatively new to Unreal Engine, so probably a really easy task…
I try to import real World Geodata and visualize it.
=> Works great so far.
Now I want to place some Trees in every forest on the map. I have 2D shapes from these areas, which I extruded in Blender an imported them as Mesh)
I found this tutorial Unreal Engine 5 Custom Shape Procedural Foliage Tool Tutorial - YouTube, my only Problem is I can’t find a function to convert an StaticMesh to an ProceduralFoliageVolume.

Is this even possible? or is there a better Way to Populate my empty Landscape with trees in specific areas?

Christian