I’ve seen this question asked but never satisfactorily answered. My watch (Forerunner 955) has no issue operating in miles and kilograms, but the iOS app can’t.
British people tend to run in miles and lift in KG. Please could this be an option in the app?
Try suggesting it directly to Garmin at Share Ideas | Garmin, they won't see your post here, on the user forum.
no response yet
Likely you will not receive a response, as stated on the Share Ideas site:
Garmin receives many ideas. While we wish we could answer each submission, it is not possible, and you may not hear back from us.
Thanks, I'll offer my opinion there.