Shadowhand urdf collision miss

[waitingyondripen]

Hi, I'm using shadowhand urdf in isaacsim, and I have already converted the urdf file to usd file, but when I check the collision in isaacsim, I found that the collision of thdistal is missing, I add the related pictures into attachment. (green part represents collision)

when I set the visual of thdistal to be unvisible, we can see that there is no collision of thdistal, you can check the picture below.

And I have tried to check the urdf file, and I found that when define the collision of thdistal, the file just uses .obj file in 'visual' directory, I wonder whether it's a bug or not. And Could I have the access to the collison file of thdistal?