Not even got my Framework Laptop 12 now (batch 8) but created my first little expansion card. More may follow.
Nothing special, just used an usb-c car ambient light, my smoll 3D printer and a little solder to have some silly RGB Modul.
The Light: https://a.aliexpress.com/_EunSpHM
No need to create an own PCB to make your Framework silly 
