How to decompose Path3D-based CSGPolygon's ConcavePolygon3D collision shape into multiple convexes?

Help Physics
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1

Godot Version

4.4

Question

I am a newbie game developer. I heard ConcavePolygon3D is tricky when interacting with moving objects and I learned I need to convert the ConcavePolygon3D into multiple ConvexPolygon3D.
Godot 4.4, nor 4.5 cannot do it, when I use Mesh->Create Collision Shape->Multiple Convex, it generates just 1 convex, not the series of adjacent convexes (maybe this is not what I should expect).
The shape that I use is a CSGPolygon generated out of the Path3D.