This is the section that lets you do it, notice how the for each node turns the diamond position socket turns into a circle socket!

Blender 4.3 (currently in beta) added a "For Each element" node which lets you use fields on node inputs that would only take single values. (circle sockets)

Now you can apply fields to strings, allowing for cool things like this to be possible!

#blender #b3d #geometrynodes