Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Microchip Technology/ATSAME51J19A/SERCOM0/USART_INT/BAUD_USARTFP_MODE#0x0
USART_INT Baud Rate
Baud Rate Value
https://github.com/cmsis-svd/cmsis-svd-data