From what I understand it's all about weather. It was a wet winter so they're waiting for it to dry out. Russia has exercised restraint mostly but soon the gloves will come off. The Biden administration keeps prolonging the conflict which is causing more casualties on both sides mostly for Ukraine. He's now pledging another $130+ billion I think in armament for the Russians to use for target practice. We're running out of munitions and money to give them and Ukraine is running out of bodies to donate to Washington's proxy war.