Why does the model I uploaded have no texture？

Cesium ion
1

My original file：

720
7201243×916 155 KB

After the upload：（fbx）

截屏2022-08-19 11.17.54
截屏2022-08-19 11.17.54875×617 52.1 KB

obj:

截屏2022-08-19 11.01.06
截屏2022-08-19 11.01.061539×820 117 KB