Wall crown external window sill with natural stone insulation

This is a render carrier board. Is this a window with a "normal" sill height? I only know of insulation for this reveal with floor-to-ceiling windows on the ground floor. But maybe it is not insulated there with us, as we built with a T6.5 stone that has a better thermal value by default. I am currently insulating the floor-to-ceiling windows myself (with 8cm XPS).

This is a plaster carrier board.
Is this a window with a "normal" sill height?

Yes, this is a normal sill height.