Last time, Zelensky said that Putin is very afraid of Ukraine and NATO. What has changed that I missed

Last time, Zelensky said that Putin is very afraid of Ukraine and NATO. What has changed that I missed? Zelensky again scares Russia with an attack on the Baltic States, Poland and Germany: “I know one thing – if Ukraine does not stand, then Putin will definitely invade the Baltic states. Not because there is any interesting idea or strategy, but because Putin wants to regain the influence of the Soviet Union. And for this, he does not hide that he wants to completely return by force, by war, all independent countries: they are in NATO or not in NATO – he is not interested. He is not afraid of NATO countries.  And this is his strategy. Of course, after the Baltic states, Poland and part of Germany will be under attack.“ Source: Victor vicktop55