Can you skip network connection in Android Enterprise Edition?

Hello jasonbayton and Moombas   Thank you for the reply 🙂 
We are using only ZT for this customer but I am familiar with Samsung's KME too and have used it with other customers. 
But here is another thing that I discovered. I tested four different enterprise model of Samsung phones. A53, A33, XCover6 Pro and S22 and without even uploading them to Knox or ZTP. They behaved exactly the way I want them. Out of the box, I couldn't skip network connection in first setup. This was set to true for all the models above that I tested.

So this could be very much as you say, there could be another build of OEM image on these phones that are sent to our customer.
But then these phones, we have uploaded them to ZTP before we sent to the customer, this is what gives me headache! They don't talk to ZTP, after they are turned on and connected to network, nothing happens. And no there is no network restrictions that could prevent them from talking to Google APIs and services.

And of course we could solve the problem by hard wiping the device, reimport them into ZTP and enroll them because this works. But we are talking about more than 100 phones here.... 

I have double checked and they have a config profile in ZTP and imported correctly.

I just want to know the root cause of the problem (why they aren't talking to ZTP and why we have to hard wipe every device) so I can present it to our customer.