Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32wl3/STM32WL33/MISC/SEQUENCER_CTRL#0x0
SEQUENCER_CTRL register
Action bit: write 1 to generate a trigger event on Sequencer.
Enable/disable the Sequencer
https://github.com/modm-io/cmsis-svd-stm32