Ear tubes usually fall off on its own within six months. In children with cleft palate, there is a higher tendency for ear infections and fluid collection behind the ear drum, which is why ventilation tubes are required. I would not be able to advise if it is required now unless I examine the ears. The ear drum heals on its own after removal of the tube.
Next Steps
Consult an ENT surgeon for examination to decide if ventilation tubes are required