GaN Substrate and Wafer Market Size and Forecasts (2021 - 2031), Global and Regional Share, Trends, and Growth Opportunity Analysis Report Coverage: By Application (LEDs, Lasers, RF Device, Transistors, Others); End User (IT and Telecom, Healthcare, Automobiles, Consumer Electronics, Military and Defense, Others) , and Geography (North America, Europe, Asia Pacific, and South and Central America)