Is it just me or has Russian casualities been quite low recently?
Both sides have been consolidating forces and waiting for some bad weather to clear up. It's particularly muddy in the Donbas right now.
The Russians have pulled their forces back roughly 15km from the left bank of the Dnieper, in the Kherson region. The idea was to create a buffer and take up defensive positions, outside of standard Ukrainian artillery range. As a result, casualties in that region have stagnated significantly.
There is still significant fighting in and around Bahkmut, but as previously noted, the combination of weather, mud and high casualty rates, have caused the Russians to take some operational pauses, despite taking small chunks of land in the area.
A similar situation is happening in Svatove, where the Ukrainians have slowly been pushing their way towards the city for several weeks now, but have been victims of not only casualty rates during the advance, but have also had to deal with significant weather and mud related issues.
I would expect that the next sustained, major fighting won't come for another month or so, until the ground is relatively frozen and both armies have done their best to equip their personnel with winter kit.