Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32n6/STM32N645/BSEC/BSEC_AP_UNLOCK#0x0
BSEC AP Unlock
any other value: do not unlock
180 (B_0xB4): unlock the DBG_MCU AP interface.
https://github.com/modm-io/cmsis-svd-stm32