For jets argument you must first understand where Kaliningrad is: something akin to Alaska for US — open the map to see what European countries are invariably in between.
Even if they crossed momentarily the air border (though there was no objective visual proof from either side, which is why the story died), supersonic jet is not like crusing at 20 mph: if you sway for several seconds you can easily graze some border. It is unprofessional but not impossible.
As for a few drones: the key word is undentified.
Yet the piece is titled: Europe is under Russian Attack. Meh