Hierachy Error in Unity

Hi, I exported Unity’s asset to FBX, then I worked on Maya and brought it back to Unity. But there is definitely an object in the Hierachy window, but I can’t see it in the viewport. You have to select it in the Hierachy window to see it temporarily. Mesh Render is checked. What’s the problem?
PLZ HELP ME
2024-07-25 01 46 08

Maybe you have LOD Group component on Start1 GO or above, and it shows you the currently displayed Lod Go only.

Remove LOD Group component