The Kersh Bridge is fully restored, according to some.
I decided to look up recent reports on the Kerch Btidge situation. According to several reports, the rail bridge has only been used for up to five rail cars and commuter passenger cars since the car bomb attack and oil train fire. It is believed the fire was so hot it damaged the reinforcing rods within the bridge cement. Only one 55 car oil train was run on the bridge since the original fire. I wonder if there were problems that surfaced that made the engineers decide to turn to the 3 huge ferries, which now are all out of use. The article below describes efforts to build a new rail lline from Rostov on Don to the northern Crimea mainland entry point, with completion hoped for by end of the year. Since it runs through occupied southern ukraine, the Ukes may have other ideas regarding completion date.
I still don’t think Ukraine will totally destroy the Kerch Bridge. They may try to damage the rail bridge if Russia tries to use it again while the 3 big ferries are out of use If Ukraine has any hope of regaining Crimea, they will want the million Russians who moved there after 2014 to be able to pack their cars and drive away.