Hi and welcome.

I see a few issues that need some corrections. Not sure where to begin, so let me start with lights. I’m afraid that your uvb lights aren’t going to be able to provide the needed uvb that your chameleon needs. The standard is a T5HO fixture with either ReptiSun 5.0 or Arcadia 6% uvb bulb. Like this.
https://www.reptilebasics.com/t5-light-fixtures-kits/arcadia-prot5-uvb-kit-24-with-bulb/ Then there needs to be about 20-22 cm distance between basking area and light.
What is the light shining in on the side and why is it on the side? You only want lights to be shining down from the top. Speaking of the top - it is normal for babies to walk upside down along the screen top but this places them at high risk for burns. You’ll need to raise your lights at least about 6-7 cm off the screen and then place your hand on the screen directly below the light. If it’s too hot to keep your hand there for more than a minute, it’s too hot for baby and can burn him.
Little ones need to eat a lot. I would be giving at least about 15 appropriate sized feeders daily. Anything larger than the space between the eyes is too big for him to eat.
Currently your enclosure is an ok size for a little one, but he will be growing fast. By the time he’s an adult he’ll be needing at minimum a 60x60x120 cm enclosure. I much prefer screen enclosures for new keepers as they are easier to modify to meet humidity needs and provide excellent ventilation - both are important in preventing respiratory infections,
One last thing - the black Exo Terra vine that you have is notorious for shedding tiny particles when itchy shedding chameleons rub their eyes against them. The particles can and have gotten trapped in sensitive little eyes and caused problems. The foamy type fake vines are much better, and even better than those are real branches. Avoid ones that have sap or odors like pine. Wash with soapy water, sun dry and they’re ready to use. I see you already have some. Just add a few more and of varied thickness so baby can exercise those little feet muscles. It is a challenge to hang branches and vines, especially in glass enclosures. Maybe try making a little frame or scaffold from the branches. I do love that you’ve got some live plants.

My other concern is of your supplements. Yes, you want to be using a phosphorus free calcium without vitamin D3 at every feeding except when using a different supplement. Vitamin D3 and multivitamin both need to be given once every other week. There are some multivitamins that are combination products and contain good amounts of D3 that you’ll only give one feeding every other week - Repashy calcium Plus LoD and ReptiVite with D3 are both excellent.
You don’t mention your temps or humidity - ideals for daytime are basking temp of about 26c for little ones and ladies and max of 29c for adult males. At night you want a good cooling off, preferably below at least 20c. Ideal humidity during the day is between 50-70%. If you can get that nice cool night below at least 20c, you can add a cool mist humidifier and boost night humidity as high as possible. That simulates hydration through fog like chameleons get in the wild.
I’m so very glad that you found your way here and are asking questions and wanting to make your precious baby’s life the best. Continue asking whatever questions you need and definitely feel free to stick around and share pics and stories of your baby as he grows.