Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32H750x/LPTIM1/LPTIM_CFGR2#0x0
LPTIM configuration register 2
LPTIM Input 1 selection
LPTIM Input 2 selection
https://github.com/cmsis-svd/cmsis-svd-data