I think a combination of solutions is needed here. But it is certain that the "Ring/Silent switch" is controlled via "Audio Session Categories".

import SwiftUI
import AVFoundation

#if os(iOS)
    let AV_SESSION = AVAudioSession.sharedInstance()
#endif

@main struct app: App {

    var body: some Scene {
        WindowGroup {
            ...
        }
    }

    init() {
        #if os(iOS)
            try! AV_SESSION.setActive(true)
            try! AV_SESSION.setCategory(.playback)
        #endif
    }

}

Links:

• Audio Session Categories and Modes
• Intro to AVAudioSession
• Type Property: playAndRecord
• Responding to audio route changes
• AVPlayer status is updated when app comes to foreground