Hello!
As mentioned in the rules in the pinned post: Welcome to the User Feedback channel!
Please always search before posting new feature requests, new threads shouldn’t be created for existing threads, especially if they’re closed with a response. There are roughly 5 threads speaking about 3D in the past 12 months, and about 20 in the past 24.
However, to speak on this one specifically before closing it: GDevelop is a 2D focused engine. There is currently no plans to add 3D functionality to it. If you are looking for 3D game development without code, I recommend looking into CopperCube or Manu Game Engine.
Thank you!