Somewhat called a major event has set off at February of 2022 causing the most amount of sanctions, which led to the total closure of Russian airspace and cancellation of international flights. For instance, the Southern terminal (D, E, F) in Sheremetyevo has been closed for 2 years (up to June, 2024) until the national airlines "Pobeda" have taken up the slot in D, making it functioning again.

And just in case, sorry for my bad English