I'm worried about melasma during the summer. Which treatment would be effective?

I've always had a little bit of freckles, but it seems like the ones around my eyes and cheekbones have gotten darker over the summer.

Even though I thought I was diligently applying sunscreen, the color seems to be getting darker, so it bothers me every time I look in the mirror. It doesn't cover up well even with makeup, so lately I've been considering getting a dermatological procedure.

I've looked it up and seen that treatments like Pico Toning, Revicol, and Skin Boosters are highly recommended. I'm curious which treatment has the highest satisfaction rate for melasma. I'd also like to know if I can see results after just one session, or if I need to receive treatments consistently over several sessions. If anyone has actually undergone treatments for melasma, I would be very grateful if you could share your experiences, including which treatment you received and how many sessions were required to see changes.