Is there a tool to convert transform offsets into polygon vertices?

Godot Version

4.2.1

Question

I have a set of Polygon2Ds that make up the map for a level. They currently have various positions. Is there a way to say "make the position x,y and adjust all the vertices in polygon data so that nothing moves.

Motivation

I want to draw my polygons for half the screen and then rotate them around the centre of the screen to make the complete map. While I started with them all having a position of the centre of the screen. While drawing the map, I’ve moved them around and now I want to reset the position without visually changing anything.

Is there a tool to do this?