Hi Alyssa and welcome,
The test results along with the visual examination which shows small red cells, both do indicate beta thal minor. An electrophoresis would show significant amounts of hemoglobin Bart if it was HbH disease (three gene deleted alpha thalassemia), and the Hb and MCV both are in range for beta thal trait. However, the lack of anything abnormal in the electrophoresis either indicates that it is not beta thal minor, or in view of the small red cells, more likely that there is a modifier gene at work, either alpha trait or a delta gene deletion, which would account for the normal HbA2 level, rather than the raised HBA2 normally found in beta minor. Neither would be of much significance in terms of health but would be of importance in terms of having future children. Determining exactly what he has will be important to him as he reaches adulthood and chooses to start a family. If he does carry a thal gene he needs to be aware of this so his partner can be tested before having children, as the combination of two thal genes can lead to thal major. The hematologist may be able to tell you more from the results but if things are still not totally clear, he may recommend DNA testing to get a better picture of the genetic makeup. Since both beta and alpha thal are common among Southeast Asians, DNA testing may be of value regardless of the diagnosis, to sort out the entire picture.
Iron is useless in beta thal minor unless there is an unrelated iron deficiency, which in this case, there is not. Following a wholesome diet can do much to optimize one's health in thal minor.