Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32L4x6/ADC1/SMPR1#0x0
sample time register 1
SMP0
SMP1
SMP2
SMP3
SMP4
SMP5
SMP6
SMP7
SMP8
SMP9
Addition of one clock cycle to the sampling time
https://github.com/cmsis-svd/cmsis-svd-data