Where can I find open hardware PCBs for ANSI 104/108 layouts ?

I am looking for an open hardware PCB Ready to send files for oshpark, seedstudio or jlcpcb like places

A PCB with the following features

wired of an MCU supported by mainline QMK/ZMK/VIA and or VIAL correctly wired for bluetooth/2.4G and wired battery powered USB-C port surface mount diode and individually addressable LEDs

Has anyone ever made such an open hardware PCB ?

Last month I purchased a keyboard, it is physically very nice and has all the features I listed above, except it runs it's own unmodifiable proprietary firmware, so the whole thing is garbage.

Pity because physically this keyboard is everything I wanted