Sounds like countries much closer to Ukraine than the United States are tiring of supporting this war without end...
It's pretty much populism, to get votes as Poland is also having elections soon. Poland has a long border with Russia and they know megalomaniac despot does not stop if he wins in Ukraine. Just like Hitler and Stalin, tsar Putler wants more. He takes a breath and continues, if he is not stopped.
On the other hand, power may change in Russia, 1917 may happen again. Previous tsar, Nikolai II, was kicked from throne exactly because of war going not so well, army begun rebelling. Tsar Putain may face something similar. Hopefully. And sooner the better.