Shader particles over scenes

Godot Version

4.5.1

Question

Is there any way to show particles created by shader on sprite2d over different scenes in tree?

Shader i use

Sure, save it as a scene and place it in all of your levels.

Or you could also add a CanvasLayer scene Global (singleton) and if you set the CanvasLayer layer property high (like 10), it will be snowing at all times in the game. That will also cover UI and stuff, so consider if you want that.