I had a look at the method you refered to, Erel.
It still works but I was wondering about 2 things...
1. Can I use a test id?
According to several Admob pages the test id for native advanced ads is ca-app-pub-3940256099942544/2247696110
but when I use it normal native ads are still showing up. I accidently clicked one of these to test the behaviour.
2. Personal ads (GDPR consent) settings seems to be missing there. How should we set this boolean?
the line below give an error that the method was not found
builder.RunMethod("NonPersonalizedAds",Null)
edit: ignore the above code as it's using the B4A lib call. I'll see if I can find the right method somewhere.