Hi Doctor, what is the best way to remove the self-harm scars on my left upper arm near my shoulder? (photo)

These scars as seen from the photo attached are from when I self-harmed around 3 years back. I've tried scar removal gels and bio-oil as well as silicone sheeting but they still remain visible and they take a toll on my self-esteem. It makes me self-conscious and I've been searching for options to reduce/remove them. How should I go about doing so? I've heard about microneedling, will it help? Or any laser treatments?