Well, last Monday the numbers were briefly posted on Russian media- 9861 dead and more than 16K injured.
It was quickly taken down, and the MoD is still saying 498, which is the same number from the beginning of March. Clearly that's not the real number.
NATO estimates 7-15K dead and 3:1 injured. So 21K-60K total casualties. A Russian division is ~12K, so that is 2-5 division equivalents from a starting force of 12-15 such formations.
Russia began this with 280K active duty forces. So not counting small garrisons in places like Moldova and the REMF types, virtually all of Putins active duty combat forces are now committed in Ukraine.
They are conscripting kids and old men in DNR and LNR and giving them Mosin-Nagants. They are asking for donations of food and medicines (specifically mentioning insulin) from civilians in Russia. The idea that they would send insulin-dependent men into combat is remarkable in itself.
China is providing MRE's, which are notoriously considered the worst in the world, so in addition to begin bogged down they are eating shit.
Russia still has a lot of armor in reserve, but Ukraine is getting a lot of support and both sides are still at about 90% of their pre-invasion force levels. But the ground won't dry up until May so the Russians are road-bound and sitting ducks. The armored columns do not include a dedicated armor recovery vehicle, and most of the trucks don't even have winches- so they get stuck in the mud and can't get unstuck.
And they've lost 40% of their trucks, which means their logistics are AFU and that is really hard to fix because sanctions mean they can't get parts.
Ukraine is asking for 500 Javelins and 500 Stingers per day, along with ADA and aircraft. There is some movement on the S-300's from Slovakia and possibly Bulgaria and Greece- The Netherlands and Germany are sending patriots to Slovakia to backfill. More aircraft is still a non-starter at this point.
No one knows what is happening at the Kremlin. There is some rumbling, but I think Putin has a tight grip and doesn't much care of a few oligarchs are unhappy.
I've been watching to see if Putin sallies any Delta's from Severodvinsk. They went out on a "navigation exercise" in the beginning of March but all returned. So far no movement. If they leave port, it's a safe assumption they will be sitting under the ice cap.