Diátaxis
I just found
https://www.diataxis.fr/A systematic approach to technical documentation authoring.
Diátaxis is a way of thinking about and doing documentation.
It prescribes approaches to content, architecture and form that emerge from a systematic approach to understanding the needs of documentation users.
I cannot become part of the documentation team (due to lack of time), that's why I dare here to ping @
Scott M. Stolz @
Der Pepe (Hubzilla) and @
Dan d'Auge from whom I know they did a lot of recent work in documenting Hubzilla or creating tutorials.