You forget that Russia is under heavy sanctions (which likely lead to the accident in the first place), and they have a difficult time maintaining their normal planes, let alone those that crash land or take off from fields
I have found an article https://www.reuters.com/business/aerospace-defense/aircraft-... about AerCap receiving 645 million dollars for 17 (or 18?) aircraft used by Aeroflot, but Ural Airlines being independent of Aeroflot, I don't think this plane is part of that agreement.