You are already using daily sunscreen + Tretinoin, and this combo is very effective for evening out the skin tone in the long run (just one note - you don't need sunscreen in the evening). If you'd like to add more actives, I'd look into Azelaic Acid and/or Thiamidol and/or 10-20% Ascorbic Acid. But please take care not to overwhelm your skin with actives to avoid irritation. You can also check out our resources section for pigmentation here: https://whatsinmyjar.com/resources/pigmentation-issues
You are already using daily sunscreen + Tretinoin, and this combo is very effective for evening out the skin tone in the long run (just one note - you don't need sunscreen in the evening). If you'd like to add more actives, I'd look into Azelaic Acid and/or Thiamidol and/or 10-20% Ascorbic Acid. But please take care not to overwhelm your skin with actives to avoid irritation. You can also check out our resources section for pigmentation here: https://whatsinmyjar.com/resources/pigmentation-issues