The reason for gingival exposure might be due to short upper lip , increased maxillary (upper jaw) facial height , so after seeing the lateral cephalogram(a side skull X-ray) a definitive treatment can be determined,
We can normally correct such situation using orthodontics(Braces/Aligner dentistry) by intruding(pushing into the bone) the upper front teeth.
Next Steps
Get a lateral cephalogram X ray
Health Tips
For a Female to have a little bit of gingival display is normal and considered aesthetically good, but if the individual isn't happy with the display, can get it corrected with Orthodontics.