Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFR32FG1P/EFR32FG1P132F64GM32/I2C0/ROUTEPEN#0x0
I/O Routing Pin Enable Register
SDA Pin Enable
SCL Pin Enable
https://github.com/cmsis-svd/cmsis-svd-data