Hello @Thomas_Wirth,
we don’t have such a tool out of the box.
For now, it is possible to move UI page from one container to another, but if you have any custom/reusable components and/or custom functions, it may become a little cumbersome for you, but still possible. Here is an instruction:
But if you have any custom/reusable components and/or functions in your page, you will also need to copy the contents of components/custom
and components/reusable
folders, and the functions
folder: