Bug camera not working when running on android

I can generate an apk of my AR project for Android. But the app doesn't work, I've tried several packages and methods, but the problem is always the same: the screen is black. although I enable the cell phone camera service, when I open the AR app the camera does not work. The attached images show the application screen open (including the menu below) but the camera does not work and everything is black.
It's not device incompatibility, as I've tested it on 3 different devices: an Infinix, a Motorola and a Sansumg. All android system and appliances are current. I'm using Unity 2022.2.17.