Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFR32FG1P/EFR32FG1P132F128GM32/I2C0/RXDOUBLE#0x0
Receive Buffer Double Data Register
RX Data 0
RX Data 1
https://github.com/cmsis-svd/cmsis-svd-data