Airlines like Ryanair and Wizz air might be different.
Swissair, Sabene (Belgium) and Olympic (Greece) went bankrupt, I'm sure there are more.
Air France and KLM (Netherlands) merged a while ago, as did British Airways and Iberia (Spain).
Ryanair is Europe's largest airline by passenger numbers.
As far as I know, Lufthansa, like some other airlines, have a government owned golden share. https://en.wikipedia.org/wiki/Golden_share
In fact, if I remember right, an EU based airline is not even allowed to be owned by more than 50% of non EU share holders.
LH’s golden share was sold off in the 1990s (that’s in the article).
And how many countries will allow others military cargo planes in their border?
In practice: most, including the US. How do you think that Russian aid was delivered last month? Not on a commercial flight.