4G network issue after iOS14 update

Having the same issue on my IPhone 11 Pro .... in Belgium .... and in data-roaming ..... with IOS 14 my network is detected as 3G or 4 G .... but no data-flow - Safari or other requests give error message “not connected to internet” ...

Yes, got the update and my 4g network has gone right away. Phone iphone11. From Turkey.