Cradio/Sweep shield doesn't have a key for that pin because it is typically the split communication pin for wired builds
#1 key missing from keymap
weak wind
There's your problem then, your PCB doesn't match cradio pinout so that key isn't mapped to anything in the firmware
You can either create a new shield, or try overriding the pin definitions in your keymap: see example in the readme here: https://github.com/zmkfirmware/zmk/blob/main/app/boards/shields/cradio/README.md