Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Silicon Labs/EFR32BG22C224F512GM32/DEVINFO/EUI64H#0x0
MA-L compliant EUI64 OUI and Unique Identifier (high bits)
UNIQUEH
OUI64
https://github.com/cmsis-svd/cmsis-svd-data