Unfortunately you’ve fallen into the UK units vs iOS settings trap. Arc uses the phone’s built in unit displaying system, which leaves the choice up to iOS itself. Though given there is thankfully now an iOS Settings option for explicitly choosing metric, it’s bizarre that it’s still choosing Imperial units for Arc! Not sure what that’s about. I’ll dig deeper and see if I can figure out what’s going on…
Ooh that might be why I hadn’t seen that option to override the region to metric before! I’m also on iOS 16 beta, so I went to double check and saw it in mine too, and thought it must’ve been added in one of the iOS 15 releases. But perhaps it’s new to iOS 16.
Ok just double checked on an iOS 15 test device, and yep, in iOS 16 they’ve added explicitly override options for Measurement System, First Day of Week, and Date Format. Yay!
Now to figure out why it doesn’t “just work” in Arc.