Schematic for extension board where ESP32 mounts?

[ptr727]

Hi, looking to make a PCB that takes a 240VAC PCB mount transformer and the ESP32 and safety fuses, i.e. a replacement for the split-phase and solar extension boards.
I may be blind, but I can't find the schematics for the extension boards on GitHub, PCB layouts would be nice, but I just need to make sure I wire the ESP32 the "same" way as the official boards.
Can anybody please point me to them?