How to split USDZ file by animation?

Hello ! The only way that I can use multiple animation is to have multiple USDZ with single animation according to WWDC example

https://developer.apple.com/videos/play/wwdc2021/10074/

todo so, I should have file with single animation
but many sources like Sketchfab.. etc it has single GLTF , USDZ file with multiple animations,

I have blender but it's too difficult to export each animation to each modeling file.

can anyone let me know how to split file by animation?

How to split USDZ file by animation?
 
 
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