All three Baltic States have now joined the UK, Poland, Czechia and Bulgaria in banning Russia the access to their airspace. Locally it will mean e.g. traveling from Moscow to Königsberg (Kaliningrad) via Gulf of Finland.
Only came to my mind: would they dare to just ignore that and use the Lithuanian airspace in spite of that?
Right now I can see Aeroflot SU2467 flying to SVO via Germany (and still Lithuania), soon this flight too will have to use this Northern route.
Btw. Germany, wake up, do what you should have done already.