It could be due to 7th cranial nerve
/ facial nerve
(branch) paresis / paralysis involving the nerve fibres supplying the muscles of face in lower face of right side. The unopposed action of muscles in left is causing the deviation.
The facial nerve is in close connection with middle ear. As your child also has hearing loss
, Otitis media
(Middle ear infection
) could be a cause for such problem which can also affect facial nerve fibres supplying the muscles.
The 7th and 8th cranial nerves (facial and auditory nerves) passes together in bony canal. A crush / compression/ fracture in the area can also cause similar symptoms.
So, get your child examined by doctor and start necessary treatment.