Question about leveling units (Mount Blade 2: Bannerlord)

How to select inexperienced soldiers in one unit in the release version? Previously, you assigned salag recruits with a pitchfork to 8 (or another number) and send them into battle against the hungry robbers. The elite at this time stands in the rear, does not take experience. And now, units can only be formed according to the class of weapons (archers, infantrymen, etc.), or am I not understanding something ?!