Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32wb/STM32WB55_CM4/LCD/SR#0x0
status register
ENS
Start of frame flag
Update display request
Update Display Done
Ready flag
LCD Frame Control Register Synchronization flag
https://github.com/modm-io/cmsis-svd-stm32