@SGaist I didn't in fact ( and I can't in the short term).
Just to clarify I'll mention the documentation related to this 'bearer stack removal' : Qt Network in Qt 6.
It also leads to QTBUG-86966 where QNetworkInformation is presented as solution for "Reachability" device state checks!!
However I still can't find anything that tells me how to overcome my "NoInternetAccess" device state related problem.
But that's great news!!
Maybe my problem has already been taken care of.
Thanks!!