They have produced a livery to show support. That’s about as far as they can (and should) go within the game.
The sunflower painting is for SEHS. For Diesel locomotives, Ukrainian routes use DR BR 120 M62 2TE109 the DB BR232 in 1.520m gauge version. Here's what a Ukrainian version of DB BR232 DR BR132
Ouch..., creating a digital route of a country in a active war and sell it on steam & epic.., where actually is the "support ukraine" part in your suggestion? The livery thing was a nice idea.