chow Did you instantiate the skeleton using the SkeletonGraphic component? If so, you need to enable Advanced - Multiple CanvasRenderers of the SkeletonGraphic component in the Inspector window, as the SkeletonGraphic component only supports a single texture by default. For more information, please see the following section of the documentation:
高级 - 单页Texture Atlas文件的导出和SkeletonGraphic
It seems that you are packing the atlas texture page with a maximum size of 2048, but Unity can load even larger images, so I recommend increasing the maximum size value and packing as the images into a single image. This allows you to reduce unnecessary draw calls and improve performance.
