All S2 images of GEE have now been cloud masked:
The product is here
https://developers.google.com/earth-engine/datasets/catalog/COPERNICUS_S2_CLOUD_PROBABILITY
The index dataframe in Breizhcrops dataset has a CLD field that originates form the QA60 field of the satellite data.
That cloud indicator is quite bad and hardly usable (from own visual inspection).
We could gather the classified cloudiness and update the CLD field in the dataframes without changing the code.
@maxzoll @charlotte-pel what do you think?