Indian brown skin. Uneven skin tone. No acne. Micodrmabrasion, Micronedling, Photofacial, PRP, colagen, hyluronc acid or glycolc peel, whch is better?

Leave it alone. None of these are likely to "help". Please forgive my frankness. Many folks have "poikiloderma", skin of varying colors. If you have freckles and don't want them, a sunscreen may help some. Nobody worth knowing cares whether your skin tone is "uneven". Appearance is about physical fitness and how you carry yourself and interact with others. Focus on what you can manage and you'll look fantastic.