Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32g0/STM32G041/LPTIM1/CFGR2#0x0
LPTIM configuration register 2
LPTIMx Input 1 selection
LPTIM1 Input 2 selection
https://github.com/modm-io/cmsis-svd-stm32