Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32wb/STM32WB15_CM4/RCC/C2APB3ENR#0x0
CPU2 APB3ENR
CPU2 BLE interface clock enable
CPU2 802.15.4 interface clock enable
https://github.com/modm-io/cmsis-svd-stm32