Joint stock company JSC Ukrainian Railways is inaugurating a railway line built to Europe’s track width standard with funding from the European Union. The new 22 km, 1435 mm gauge line connects the western Ukrainian cities of Uzhhorod and Chop, facilitating freight and passenger rail connectivity...
I would guess MÀV stopped sending its wagons beyond the border of Ukraine in February '22, and Ukraine doesn’t have 1435 mm wagons it could.apare for that traffic, so probably the Hungarian trains don’t currently serve Mukachevo.
The two broad gauge routes – to Poland and Slovakia – have been constantly in use all the time from Soviet times, and are still in use. A passenger traffic on the broad gauge line to Poland, at least to Hrebenne, was opened for evacuations in March 2022, IIRC, and the route remained in use after that.