Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32H7x5_CM7/FDCAN1/CAN_TTGTP#0x0
FDCAN TT Global Time Preset Register
Time Preset
Cycle Time Target Phase
https://github.com/cmsis-svd/cmsis-svd-data