Why is it okay for my face to get the CO2 under my eye but not for my lip area? (Photos)

you are an amazing candidate for co2 laser, I am not sure what your provider is talking about. you are also a great candidate for dermaroling at home (see link) and peels, as well as halo combined with fillers and micro needling for these areas.

at home peels like cosmelan, enlighten and aerify along with dermarolling (MTS roller with anteage MD ampules weekly, see linkt) should be started now to prevent further aging.

For facial rejuvenation, I would suggest a combination approach of
1) skin care with products and PRP/microneedling
2) PDT light therapy few times a month with growth factors
3) laser treatments like clear and brilliant regularly and a few times a year Fraxel/halo Viva, Co2/Erbium
4) Sculptra injections a few times a year for collagen production with fillers like juvederm/restylane/belotero/radiesse/bellafill
5) thermage/ultherapy for yearly skin tightening with or without PDO or cone based instalift threads for lifting
6) botox every 2-3 months to stop movement lines and prevent lines at rest
7) deep microneedling RF like Fractora/morpheus8 for tightening of the skin
8) Vascular laser like vbeam/excel V or BBL forever young treatment every quarter (3-4 months)

Best, Dr. Emer.

Hello and thank you for your question. By upper lip I assume you are talking about the"mustache" area and not the mucosa of your lip surface.
I routinely do upper lip area when I do complete faces with CO2. I am uncertain why your provider would decline to do this for you. It is a very safe area to laser. I would get a second opinion from another provider.
Best of luck to you.