The Wiki pages are an easy to overlook resource - neither a discuss forum search nor an Awesome documentation search will uncover them (of course!)
Trying to get sense of what is where I am aware of these high level ‘root’ links.
If there are any others please add them to the list, thanks
https://github.com/frappe/erpnext/wiki 91 pages
https://github.com/frappe/frappe/wiki 30 pages
https://github.com/frappe/bench/wiki 23 pages
https://github.com/frappe/accounting/wiki 1 pages
https://github.com/frappe/frappe_docker/wiki 2 pages
https://github.com/frappe/bench_manager/wiki 4 pages
https://github.com/frappe/schools/wiki 2 pages
https://github.com/frappe/manual_erpnext_com/wiki 1 page
Only some repos have a corresponding wiki (just those listed above)