watchkit app doesn't contain any watchkit extensions. verify that the value of nsextensionpointidentifier in your watchkit extension's info.plist is set to com.apple.watchkit.

[cagnulein]

with the new xcode 13.3 you need to use the default build system instead of the legacy one ( https://developer.apple.com/forums/thread/656312 )

If you try to compile using the legacy you will not be able to archieve it

THIS IS A REMINDER FOR ME

[cagnulein]

also https://bugreports.qt.io/browse/QTCREATORBUG-25368?gerritReviewStatus=Open