yep ,The problem of duplicating the tools is, as I have already said a few posts above, is that most of the buttons pannels of property are functions exclusively of the 3d space wiew, and being in a completely different space view, conflicts arise when working in full screen mode.
This is a problem rooted in the beginnings of blender, because it was originally designed with two “work sections”: the properties of the tools and that of the 3d view.
To make everything conceptually clearer and more explicit, the property pannels were initially a sort of bottom sidebar of the 3d view. (in reality there was also the top info and setting sidebar but closed)
Then everything has evolved over the years, many other work modes have been included, but initially there was this area “of properties” and this area “of editing views”
At a certain point he decided to transform this area of the properties into an “interchangeable space window like that of the 3D view and others” in order to make it more flexible, but in doing so, he lost that characteristic of being the exclusive area of the properties that in the end it was more like the one in 3d view …
and over time the sidebars were added …
then blender has continued to evolve a lot but this ancient “defect” has remained rooted.
So to make a correction “of the old design flaw” it would be necessary to make most of the properties of the 3D view, exclusively local to the 3D view, and that is why I consider the proposal to make the buttons property bar and the addons bar become something unified and transport all the property panels that act exclusively with the 3d view in the N sidebar, but keeping the interesting proposal of @dotails & George.Mitev feasible in some way, so that the correction of the architecture of operation can be done without causing big visual dissento on how it is worked so far.