Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/stm32/stm32u5/STM32U535/ADC1/ADC_SQR1#0x0
ADC regular sequence register 1
L
SQ1
SQ2
SQ3
SQ4
https://github.com/modm-io/cmsis-svd-stm32