Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Microchip Technology/ATSAME51J19A/CAN0/RXF0S#0x0
Rx FIFO 0 Status
Rx FIFO 0 Fill Level
Rx FIFO 0 Get Index
Rx FIFO 0 Put Index
Rx FIFO 0 Full
Rx FIFO 0 Message Lost
https://github.com/cmsis-svd/cmsis-svd-data