Been going on for months now, fields are already littered with fiber cables https://i.redd.it/dhqh7hdzh64f1.jpeg , same for the trees https://i.redd.it/qce5c5n7pwpe1.png , impacting nature as always https://i.redd.it/z2dy2m26p45f1.jpeg . Soldiers are occasionally cutting wires https://old.reddit.com/r/UkraineRussiaReport/comments/1l5nz54/ru_pov_russians_cut_ukrainian_drones_fiber_optic/ ,even with other drones https://old.reddit.com/r/UkraineRussiaReport/comments/1kxcwex/ru_pov_russian_dji_mavic_uses_its_propellers_to/ .
The issue with destroying the wire is that finding the correct one becomes impossible after sustained use in a certain area, let alone being able to reach the cable safely in the first place.

https://www.google.com/maps/d/viewer?mid=1V8NzjQkzMOhpuLhkktbiKgodOQ27X6IV&ll=48.387610886589165%2C37.25272350487889&z=11 North facing breakthrough extends about 25km on the eastern side of Pokrovsk, the recent (past week) advances make up about 10km.