How to apply geomentry node?

I created a procedural Tree with geomentry node by scattering branches on trunk mesh,but i can’t apply the scattered particle it just reset to base trunk.

Hi, I’m not sure if this is what you want to do.
Ctrl+A > Make instances real. Immediately having the objects selected, M to move the tree elements to a new collection. That way you can create a collection instance of your tree associating it with Empty element.

Try Ctrl-A and all the way down in the menu you will see “make instances real”

can i export to unreal or unity?.