EnvironmentValues+windowScene.swift

import SwiftUI
import RegexBuilder

struct ContentView: View {
    @Environment(\.windowScene) private var windowScene
    
    var body: some View {
        Button("Print UIWindowScene") {
            if let windowScene {
                print(windowScene)
            }
        }
    }
}

extension EnvironmentValues {
    var windowScene: UIWindowScene? {
        guard
            let _plist: Any = Mirror(reflecting: self).descendant("_plist"),
        let description: String = (_plist as? CustomStringConvertible)?.description
        else {
            return nil
        }
        
        let regex = Regex {
            "scene = <UIWindowScene: 0x"
            Capture {
                OneOrMore(.hexDigit)
            }
            ">;"
        }
        
        guard let output = description.firstMatch(of: regex)?.1,
              let attr = Int(output, radix: 16)
        else {
            return nil
        }
        
        return unsafeBitCast(
            UnsafeRawPointer(bitPattern: attr), to: UIWindowScene.self)
    }
}