Thanks Xunreal75 In my case it was solved for xamarin by activating the link to sdk framework option in the builds option. thanks!!

Similar issue xamarin We can't upload the app to testflight ITMS-90338: Non-public API usage - The app references non-public selectors in AppSBS.iOS: checkFocusGroupTreeForEnvironment:, commissioningComplete:, setListenPort:, sharedController, sleep:, test:, toggle:. If method names in your source code match the private Apple APIs listed above, altering your method names will help prevent this app from being flagged in future submissions. In addition, note that one or more of the above APIs may be located in a static library that was included with your app. If so, they must be removed. For further information, visit the Technical Support Information at http://developer.apple.com/support/technical/ We hope they can solve it quickly...