Russians Targn Bridges Over the Niper to Prevent Supplies From Reaching the Dambas?

Why haven't we seen the russians targn bridges over the niper to prevent supplies from reaching the dambas? That is a brilliant question. The moment i find out the answer for myself, i will be happy to report it. One of the questions i've had is, why haven't they tried to target the lings from poland into into western qrane? That is what is responsible for much of the weaponry that's comingi from the west. Yet, you haven't seen any strikes against the signalling stations or any of the intra structure that you would need to operate the railing no ihavent. And haven't seen that many strike acture against uc