Firmware:
ydkb_kbdfans_kbd8xmk3_vial.uf2
(update: 2023-10-18)
Json file:
ydkb_kbdfans_kbd8xmk3_via.json
(update: 2023-10-18)
Download latest VIA firmware from
https://ydkb.io/help/?www#/other-firmware/vial
(select KBD8x Mk3)