iOS target value

How do I set target value. I dont want any users below iOS 14.0 to be able to get my update.

You can set it in the build.settings:

settings = {
 
    iphone =
    {
        plist =
        {
            MinimumOSVersion = "14.0",
        }
    }
}

Try doing what the error message is telling and let us know how it works.