Taking a proportional approach to unit representation as it brings data from Crusader Kings 3 to Mount & Blade 2, the mod looks at both the size and composition of the armies set to go into battle and maintains this as it scales the forces down to a size that Mount and Blade can render on screen.
A developer has created a very smart mod that turns Crusader Kings 3 and Mount & Blade 2 into a single game, allowing players to strategize in the former and battle inside the latter.
In order to run the mod, you will of course need to own both Crusader Kings 3 and Mount and Blade 2: Bannerlord.