Method 1: Set Model3D through code
Model3D(named:"你的3D模型名称",bundle:realityKitContentBundle)
.padding(.bottom,50)
.scaleEffect(0.2) //这句用来缩放
Method 2: Others can do it, but I have verified that it doesn’t work
In the RealityKitContent tool, select the 3D model, set the X/Y/Z scaling of the Transform's Scale, and remember to save it