This examples work:
https://github.com/LitleCarl/ShowAndTell
https://github.com/akshatjagga/Nosco/blob/master/README.md
The Fritz pods dependencies should be updated:
pod "Fritz", "7.0.1"
pod "Fritz/VisionPoseModel/Human/Fast", "7.0.1"
More information here:
https://github.com/fritzlabs/fritz-ai-ios-sdk
But there is some issues with accuracy.