Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/STMicroelectronics/STM32L4x6/ADC1/CFGR2#0x0
configuration register
DMAEN
DMACFG
RES
ALIGN
Triggered Regular Oversampling
EXTEN
https://github.com/cmsis-svd/cmsis-svd-data