If you are still looking to a solution to this problem - or for anyone else who needs CLKComplications for watchOS 7 and 8 and to also have WidgetKit complications for watchOS9+ in the same app, the key to getting CLKComplications working on a single target watch app is to implement the getComplicationDescriptors(handler:) method in your ComplicationController class. In this method you need to specify the complications your app supports. If you don't do this, the complications won't show up at all, even if you specified supported complication families in the info.plist file. In fact, you need to delete the CLKComplicationSupportedFamilies key from the info.plist once you implement the new method in the ComplicationController class. Note that if you are adding WidgetKit support for complications into an older app, you will want to migrate your two-part app into a single target, which means that a minimum target will be watchOS 7 (which will bring with it this CLKComplications problem). If you don't migrate to a single target app, the WidgetKit complications will not update reliably at all.

There seems to be no way to put the title back into top-left corner when compiling with watchOS 10SDK. It's a shame because it really eats away the space on non-scrolling fixed layout screens. I believe they moved the title to where it is now because in watchOS 10 you can (in SwiftUI only) have a layout that has a button in the top-left corner.

I'm considering doing some light visionOS development on a Ventura / Xcode 15 beta 2 on an Intel Mac, and then maybe publishing it to App Store later on friend's AS Mac. Wonder if this approach would be at all possible? I can't justify buying a new computer just for this. Really a shame they just dropped support like that, as it seemed it would work fine on Intel Macs.

@waldgeist I'm guessing you eventually had to get an Apple Silicon Mac to continue developing for visionOS, right? I think the simulator only worked in beta XCode, but in the final 15.2 which must be used for app submissions, I don't think there's a way to get it working on an Intel Mac, no matter what OS you're using. I'm considering doing some simpler visionOS development on Ventura / Xcode 15 beta 2 on an Intel Mac, and then maybe publishing it later on friend's AS Mac. Wonder if that's still possible?

I am seeing the same exact problem that Johnno described, and it started happening again with watchOS 9. Same problem was happening before with various watchOS releases, but it was recently fixed at one point in watchOS 8 cycle. I'm seeing the same problem where the GKLocalPlayer.local.isAuthenticated is always false in my game, and every other game on the watch I have that has a leaderboard feature is reporting some error with Game Center now, and can't access leaderboards anymore.