Bridging STAC extensions and OGC TrainingDML-AI

I noticed this branch was in development: https://github.com/geopython/pygeometa/compare/tdml-ai
At the same time, STAC seems supported, but only for basic content: https://github.com/geopython/pygeometa/blob/master/pygeometa/schemas/stac/__init__.py

Are there plans to bridge the other STAC extensions relevant to datasets, such as:
- https://github.com/stac-extensions/classification
- https://github.com/stac-extensions/label
- https://github.com/stac-extensions/ml-aoi
- https://github.com/stac-extensions/scientific
- https://github.com/openrsgis/trainingdml-ai-extension