Yeah did that.
Give it a few minutes and check the widget again – tried for half an hour yesterday to make it work, it reverts back to km until you refresh the car status inside the app, then it shows miles for a few minutes again.
edit: on the phone
Prior: SEAT Ateca Xcellence Lux 1.5 TSI DSG MY19, VW Golf GTE PHEV DSG MY23
Current: Hyundai Ioniq 6 Ultimate
Next: we'll see what's available in 2028.