How to access the object screen size in blueprint?

is it possible to get the screen size of an object via blueprint?
not talking about billboard screensize or arrow component screen size. which are only property “getters”
i mean the real screensize of any object for a scene. just how it is implemented in the mesh editor for the LOD, which seems to be done via projections and the game viewport client.

Bumps, would like to know this to as im trying to make a LOD system based on camera line of sight