Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFR32BG12P/EFR32BG12P432F1024GL125/MSC/BANKSWITCHLOCK#0x0
BANKSWITCHLOCKKEY=UNLOCKED
Bank Switching Lock Register
Bank Switching Lock
0 (UNLOCKED): undefined
1 (LOCKED): undefined
https://github.com/cmsis-svd/cmsis-svd-data