The Plaket60 is a 60% keyboard designed by Plaketdebeur which run in private GB in early 2023.
If you were part of this GB you may found this repository useful.
In ./hardware you'll find the complete Kicad project and the plate files.
In ./firmware you'll find the vial uf2 and bin files with the keyboard folder containing vial source code for this keyboard.
The PCB design is based on dedecline's SST60