Certain properties in Qt Quick 3D Physics need to be shadowed for usability reasons.

The most important one is the PhysicsWorld.running

https://doc-snapshots.qt.io/qt6-dev/qml-qtquick3d-physics-physicsworld.html#running-prop

As the user will want to to set the physics to be running, but are unlikely to want Physics to be actively running while editing a scene (which is what will happen in QDS).

Also any CollisionShape based components will likely want to have enableDebugDraw enabled when selected in the 3D View regardless of whether the user has it enabled or not since this is the visual representation to the user of the collision bodies shape.

https://doc-snapshots.qt.io/qt6-dev/qml-qtquick3d-physics-collisionshape.html