Thank you for your query,
X-ray nasal bone
is the initial investigation to look for any nasal bone fracture
But without a history of trauma and pain, the fracture of the nasal bones and deformity
of the nasal bridge is unusual.
But as the child is still growing, the time of surgery to correct the widening deformity of nasal bridge will be decided by your ENT specialist
So consult the ENT surgeon for the opinion on correction and the timing of surgery.
Hope I have answered your query.