Hyperpigmentation query

I have been using niacinamide with adapalene gel for last 20-25 days there's no much difference I have been seeing on my face and i really wanna reduce my post acne marks so can anyone tell me an alternative or am I expecting results too soon btw I'm attaching a photo so that you can get an idea

u/BedPuzzleheaded3092 — 17 hours ago