Hello
I have such a question. Is there possibility, that in one Blender Window I have two VIEW 3D, but modifiers is displaying in only one VIEW 3D ?
Like in this screenshoot. That modifier boolean is displaying/working, only in VIEW_3D on the right side ? Of course in Python
A workaround would be to have two objects but with a linked mesh. Give only one of the objects the modifer. Then show one object in one viewport and the other object in the other viewport with local collections.