ios – AVFoundation: The best way to detect macro mode utilizing AVCaptureDevice?

I want to copy native Digicam.app behaviour, particularly the macro mode.
I am utilizing digital units like .builtInTripleCamera or .builtInDualWideCamera and they’re able to enter macro mode with this code:

if machine.activePrimaryConstituentDeviceSwitchingBehavior != .unsupported {
    machine.setPrimaryConstituentDeviceSwitchingBehavior(.auto, restrictedSwitchingBehaviorConditions: [])
}

That works nice, however now I must show in my UI that digital camera has entered macro mode. And that is the place issues get troublesome: macro mode is principally simply an ultra-wide digital camera that’s zoomed in (or cropped), proper?
We will observe when a digital machine adjustments its lively major constituent machine utilizing KVO, like this:

let activeConstituentObserver = machine.observe(.activePrimaryConstituent, choices: [.new]) { [weak self] machine, change in
    guard let self = self else { return }
    guard let activePrimaryConstituentDevice = change.newValue ?? machine.activePrimaryConstituent else { return }
    let isMacroEnabled = activePrimaryConstituentDevice.deviceType == .builtInUltraWideCamera
    DispatchQueue.most important.async {
        self.cameraView.macroButton.isHidden = !isMacroEnabled
    }
}

However this observer will get known as each time an lively constituent machine adjustments, i.e everytime ultra-wide digital camera turns into lively (when person zooms out to 0.5x). AVCaptureDevice does not have “isInMacroMode” property, so what will we do? Properly, since macro mode is only a cropped ultra-wide digital camera, then we in all probability want to take a look at videoZoomFactor property, proper? However each units have their videoZoomFactors set to their default values (0.5x and 1x from person’s perspective)

let activeConstituentObserver = machine.observe(.activePrimaryConstituent, choices: [.new]) { [weak self] machine, change in
    guard let self = self else { return }
    guard let activePrimaryConstituentDevice = change.newValue ?? machine.activePrimaryConstituent else { return }
    let isMacroEnabled = activePrimaryConstituentDevice.deviceType == .builtInUltraWideCamera
    print("activePrimaryConstituentDevice zoom: ", activePrimaryConstituentDevice.videoZoomFactor) // 1.0 (aka 0.5x)
    print("virtualDevice zoom: ", machine.videoZoomFactor) // 2.0 (aka 1x)
    DispatchQueue.most important.async {
        self.cameraView.macroButton.isHidden = !isMacroEnabled
    }
}

So my query is: how do I detect that digital machine entered macro mode (not simply modified its digital camera to ultra-wide)?