Bug Unity does not generate AR that works

hey guys.

I have a difficulty here, I'm new to Unity and I'm trying to generate an example in augmented reality with real world coordinates.
I've based myself on several tutorials on the internet, especially those listed below:

But when I generate the application the screen is completely black. nothing works. The cell phone camera is not activated and I cannot know if it is working.
I just need to place one or two objects positioned in the real world, it's an experiment I want to do, however it's been a lot of work. Unity seems to me to be the best tool for this, but I always run into a problem that I can't get out of.
I'm trying to generate for the android system and the Unity version I'm using is 22.2.17.
Can someone help me? Please!

 

Can someone help me?

 

Where is the Project Validation option? I am trying out the newly announce Google GeoSpatial Content package for the ARCore Extensions. Followed the quick step guides from blank project to App on my phone. I'm not using URP (unless that is now the default Render Pipeline) and still get a black Screen when I start the app.