Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32wl3/STM32WL33/MR_SUBG/AGC3_CTRL#0x0
AGC3_CTRL register
Minimum AGC attenuation.
Maximum AGC attenuation.
https://github.com/modm-io/cmsis-svd-stm32