Hyperpigmentation around belly button after TT, is there a way to speed up the lightening process? (photos)

My belly button was reconstructed during a TT. It's not a typical TT belly button. My dr was able to save mine after a hernia repair. It's healing nicely but seems to be getting darker by the day. I saw my PS this week and he called it hyperpigmentation and said it should lighten over time. His office gave me a scar gel to use but I'm wondering if there's anything else I can do to speed up the lightening process.