Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32wl3/STM32WL33/STATIC/DATABUFFER1_PTR#0x0
DATABUFFER1_PTR register
Start address to be used by the Data Buffer1
https://github.com/modm-io/cmsis-svd-stm32