Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32wb0/STM32WB07/RADIO/AGC2_ANA_TST#0x0
AGC2_ANA_TST register
Selection:
the AGC antenna trimming value ( when AGC2_ANA_TST_SEL = 1)
https://github.com/modm-io/cmsis-svd-stm32