And how is this surprising
There is a long history of this and several very good documentaries. I do not recall which channel ran that particular documentary, but they had interviews with retired Caravelle pilots which flew the Paris Moscow route when it opened.
They regularly carried electronic surveillance payloads installed by French special services and in some cases pretended to have a misunderstanding with air traffic control to go closer than they should to security zones above military installations in order to record AA radar activity and radio traffic.
So nothing new here.