Importing a model with drivers from blender

hello, i am trying to import a tank model that i created in blender that uses drivers to move the tank in any direction, but when i try to import it and i turn off combine meshes it gets imported as 21 sperated meshes even tho i’ve parented them into one single object in, how can i fix this?
thank you for your answer ^.^
i’m pretty much a beginner so forgive me for being dumb XD