(3.8.6)Why does a new 2D project allow me to add a new Sprite, but not in a new 3D project?

Cocos Creator
1

When creating a new project, if I choose a new 2D project, I can add a sprite to the scene, but when a new 3D project created, it doesn’t allow me to add a sprite, what is the reason?

2

For example, in a newly created 2D project, I can drag and drop a sprite to add a new image into the scene:

But in a newly created 3D project, the project doesn’t allow me to drag and drop to add a sprite:


I even try to drag the image to the spriteFrame field of a cc.Sprite element (I also created a cc.Canvas at the parent), it still rejects me to add a new sprite into the game:
What is the reason? Is there any settings in 3D projects different from 2D project? If I want to add a sprite into a 3D project, what settings should I change?