A T-34 would be next to unless in Ukraine, and would just be a death sentence, a T-34 probably isn't even worth fielding against the more modern armour and ATGM's that are in Ukraine.
Not to mention that Russia likely doesn't have any tank groups trained on the T-34 so they would need to spend time doing that as well.
If Russia calls a general draft they are beyond desperate, their actual contract army is already doing incredibly poorly in Ukraine, called up conscripts would do even worse.
Its worth keeping in mind that Russia still needs to defend the rest of its territory whilst invading Ukraine, they are incredibly paranoid about NATO and if Finland/Sweden join NATO they will need to deploy more troops to that border to try look like a real super power again.