After many countries closed their airspace, the EU as a whole is closing it's airspace to Russia. Russia will definitely block it's airspace in retaliation.
For those tracking Aeroflot flights, they are all registered in Bermuda, not Russia
Keep in mind the importance of the Siberian Corridor, but given that China/HKG/Japan is still more or less shut
due to COVID, the immediate impact won't be felt as fast, besides for cargo flights