Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32wb/STM32WB15_CM4/PWR/CR4#0x0
Power control register 4
Wakeup pin WKUP1 polarity
Wakeup pin WKUP4 polarity
VBAT battery charging enable
VBAT battery charging resistor selection
BOOT CPU2 after reset or wakeup from Stop or Standby modes
https://github.com/modm-io/cmsis-svd-stm32