Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32l5/STM32L552/FLASH/WRP2BR#0x0
Flash WPR2 area B address register
WRP2B_PSTRT
WRP2B_PEND
https://github.com/modm-io/cmsis-svd-stm32