Will the Libby Heal treatment be effective if I get it in the summer?

The sunshine was great from late April through May, and my skin has inevitably turned dark. My skin elasticity has dropped and it lacks moisture, so it feels like I’ve gotten a really bad tan, beyond just looking dull. If I stay this tanned, I’ll have to walk around like a country bumpkin all summer long, and looking in the mirror just makes me sigh. Usually, when I look in the mirror after washing my face in the morning, my skin looks fair right away, but today, there wasn't even that; I just saw a total ugly mess in the mirror. Even if my skin texture fluctuates, it usually recovers after that cycle passes, but I can't restore my skin to its original state with my own power now that it's so dull and tanned. So I looked into it, and I heard that a treatment called Livy Heal is a good fit for my skin. Unlike other skin boosters, Livy Heal is said to focus on skin regeneration using stem cell culture fluid and melanin inhibition using NAD+ ingredients. However, one thing that bothers me is, aren't treatments with whitening functions like Livy Heal somewhat avoided during the summer when the sun is strong? Or, like other treatments, is Livy Heal a safe procedure if I just pay attention to sun protection afterward? I would like to look into other treatments if the effects start to wear off. It would be very helpful if you could let me know if Libby Heal is a treatment that is not affected by the seasons, and if I do get it, what the optimal frequency and number of sessions should be.