Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32wb0/STM32WB07/RADIO/AGC1_DIG_ENG#0x0
AGC1_DIG_ENG register
Low threshold for 6dB steps
AGC locks when level is steady between high threshold and lock threshold
AGC locks when Access Address is detected (recommended)
https://github.com/modm-io/cmsis-svd-stm32