Api/qualityprofiles/projects does not return projects for default profile

Nothing in the SonarCloud docs mention the WebAPI to back or refute your statement. If we take the usual course of action when the sonarcloud docs are missing a section, we would fall back to the official docs for SonarQube. Web API

SonarQube provides web API to access its functionalities from applications.

Which seems to disagree with your assertion. If you are really going to take that position as official it would be fair and reasonable to update your public documentation to state that.

I dont know where you got the idea that I’m looking to do something unsavory like data mine. We just need to manage. Our org has 670+ projects loaded to Sonar (and ~1K GH repos that havent been setup as sonar projects yet) to keep tabs on and your user interfaces just dont scale. They are too focused on individual changes and monitoring at the project level.