I think the Ukrainian army is tied up in the East, Russia is tied up there as well, they try to encircle the Ukrainians from the south while pushing for Kiev for political reasons ...
The Ukrainians have almost nothing except for their positions in the East. Still that doesn't explain why the Russians aren't brining in their artillery and air force ... maybe they wait for the encirclement to complete because at that point they expect the enemy to capitulate? -- underground experts united https://dataswamp.org/~incal
