Some processes are documented, some are "hidden"

So due to the fact that there are some processes specifically documented and some are only available through the "generic way", people seem to think some processes are not available.

So it seems people are looking at e.g. https://open-eo.github.io/openeo-python-client/api.html#openeo.rest.datacube.DataCube for processes and don't find all processes they expect and then don't understand that they have to switch to using the generic way ( https://open-eo.github.io/openeo-python-client/processes.html#generic-api-for-adding-processes ). Instead, they seem to think that the other processes are not available (or not documented) as they don't find the process specifically mentioned in the client docs while they find some other specific processes.

How can this be improved?

Start by comparing the DataCube API documentation with the generic API for adding processes at the two linked documentation pages. Improve the documentation so users can see which processes have dedicated methods and how to use all other processes generically; done means the availability distinction is clear.