What did I miss when apply the flavor manually?

[zhxst]

Use the flutter_flavorizr to build a flavor example, works fine.
Trying to apply the flavor settings to my already exist project.
Got an issue on iOS. When running flavor from vscode, it shows Could not find the built application bundle at build/ios/iphoneos/Runner.app.
Compare to the flutter_flavorizr example project. There is a build/ios/iphoneos/Runner.app after build.
But my custom one only has build/ios/iphoneos-flavor-debug/Runner.app , no iphoneos one was created.
Spend a lot of time, but did'n figure out what configuration is missing here.
So dose any one can help, Please?

[zhxst]

Accidentally delete the scheme for flavor, create again, problem gone.
I have no idea what has changed.

By comparing the git history, there is a new .xcscheme file which didn't exist before. Did I created a scheme without a .xcscheme file ?