Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFR32BG12P/EFR32BG12P132F1024GL125/LETIMER0/ROUTEPEN#0x0
I/O Routing Pin Enable Register
Output 0 Pin Enable
Output 1 Pin Enable
https://github.com/cmsis-svd/cmsis-svd-data