Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32wl/STM32WL5x_CM0P/SYSCFG/SCSR#0x0
SCSR
SRAM2 erase
SRAM1, SRAM2 and PKA SRAM busy by erase operation
PKA SRAM busy by erase operation
https://github.com/modm-io/cmsis-svd-stm32