Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32g4/STM32G473/FDCAN1/PSR#0x0
FDCAN Protocol Status Register
LEC
ACT
EP
EW
BO
DLEC
RESI
RBRS
REDL
PXE
TDCV
https://github.com/modm-io/cmsis-svd-stm32