Hi, Yeah it seems to be pretty buggy. For example, animations don’t work and .onChange does not get called. I solved it by using .overlay and manually position the view.

It works on device for me! (Sorry, can't edit my old post anymore)

Same here, I can't implement it on watchOS 7.3

Okay I've solved it: Its important to convert the string to an NSString. The dictionary would become this: let metadata : NSDictionary = [ HKMetadataKeySyncIdentifier : NSString(string: match.syncIdentifier.uuidString), HKMetadataKeySyncVersion: match.syncVersion ] I'm leaving it up here in case somebody else comes across the same problem