While Russia has certainly lost a lot of armor, I don't think the "1200 tanks" is still relevant. Once they figured out that this thing wasn't going to be the cake-walk they thought, Russia almost certainly ramped up to repair, update and activate some of their thousands of mothballed tanks, as well as moved armor from other areas of Russia to support the war.
I’m sure RuZZia has attempted to add tanks to the war. But what is that number?
I cant track against a number I dont have.