Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32l5/STM32L552/RCC/AHB3SECSR#0x0
RCC AHB3 security status register
FSMCSECF
OSPI1SECF
https://github.com/modm-io/cmsis-svd-stm32