I think “you can’t” or at least is not trivial.
Kindly check Multi scene sharing object (meshes, materials) and Multi scene sharing object (meshes, materials) - #2 by Deltakosh for more info.
I was struggling to do the same and find that just reloading the mesh is fast enough. I cache them when it makes sense and dispose them when not needed. I also suggest looking into Copies, Clones, and Instancing | Babylon.js Documentation for ways to optimize handling meshes.