can somebody help me how to choose russia in solo coop mode?

they sadly disabled this feature before BF6 slop was released .. before that, you could run a map to start as russia side .. making unlocking achievements very difficult now
EA had intentionally removed LOTS OF "QoL" in BF2042 in favour for this BF6 slop release .. for this BF6 COD slop, features were removed in 2042 to bleed it out .. EA promised to bring back BF2042 events to unlock limited skins, vehicles and weapons, even new weapons, new vehicles and other features, shamefully not yet happened. promise was set officially before BF6's Open Beta events and v1.0 launch
.. we are still waiting ..