Power wants to avoid accountability, and therefore it avoids transparency wherever possible. No surprise there, and no different from what happens in corporate boards where consensus is established by board members glancing meaningfully at each other, so the agreement doesn't enter the record.
I've long observed the governing bodies of GNOME, Mozilla, and Wikimedia (whose composition doesn't reflect the composition of the community, to put it mildly) to act like mediocre corporate boards, and I'm sure the same power structures and patterns of behavior can be found in other large open source projects.
The code of conduct consists of individual provisions, articles, and paragraphs. It should be easy (in fact, it should be a prerequisite for such actions being taken) to cite the specific provisions of the CoC that were supposedly violated, and to enter that information into the record. That this didn't happen speaks volumes.
I've long observed the governing bodies of GNOME, Mozilla, and Wikimedia (whose composition doesn't reflect the composition of the community, to put it mildly) to act like mediocre corporate boards, and I'm sure the same power structures and patterns of behavior can be found in other large open source projects.