Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/Series1/EFR32MG12P/EFR32MG12P433F1024IL125/USART2/RXDATAX#0x0
RX Buffer Data Extended Register
RX Data
Data Parity Error
Data Framing Error
https://github.com/cmsis-svd/cmsis-svd-data