Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32n6/STM32N645/DBGMCU/DBGMCU_IDCODE#0x0
DBGMCU identity code register
Device ID
1158 (B_0x486): STM32N6xx
Revision
https://github.com/modm-io/cmsis-svd-stm32