Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32wl3/STM32WL33/RETAINED/RFIP_WAKEUPTIME#0x0
RFIP_WAKEUPTIME register
(Absolute) Target time to wakeup the RFIP.
https://github.com/modm-io/cmsis-svd-stm32