Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32wl3/STM32WL33/LCD/LCD_CR#0x0
LCD_CR register
LCD controller enable
Voltage source selection
Duty selection
Bias selector
Voltage output buffer enable
https://github.com/modm-io/cmsis-svd-stm32