All of the ControlNet models for Core ML have been moved to a new repo:

ControlNet Models For Core ML

(https://huggingface.co/coreml-community/ControlNet-Models-For-Core-ML)

which is a part of the

Core ML Models Community

(https://huggingface.co/coreml-community)

You can also find base models for use with ControlNet over there.

Models for use with ControlNet have "_cn" appended to the model & repo names.