qmk_firmware/keyboards/boardsource/lulu/rp2040/info.json

{
  "bootloader": "rp2040",
  "matrix_pins": {
    "cols": ["GP2", "GP3", "GP4", "GP5", "GP6", "GP7"],
    "rows": ["GP14", "GP15", "GP16", "GP17", "GP18"]
  },
  "processor": "RP2040",
  "encoder": {
    "rotary": [
      { "pin_a": "GP8", "pin_b": "GP9" }
    ]
  }
}