Can’t play Russia On Coop in 2042

So i’ve been playing bf2042 for a while and before i was fine leveling everything up and now i can’t level anything up on the russian side and it kinda frustrating when i only get the us over and over again and i don’t want to play public cause people just hog the jets and helis so i barely get to fly and i would enjoy if this is fixed. thanks have a great day