What's a recommended treatment for boxcar scars on cheekbone? They're about a year old

Hello, I am looking to improve these scars on my cheek, they're about a year old at the most. They're mostly only visible under indirect/angled lighting. I've done a couple of treatments with 0.5mm dermaroller and one with a 1mm dermastamp since February-March, but I don't think there's any visible improvement. (The photo is from April) I'm also trying Tretinoin 0.05% and I think one boxcar scar on my other cheek has improved slightly. I'm going to try SECRET RF this week, as well. Thank you.