Well off the bat I see a lot that need changing.
Chameleons should have a cage that is taller then wide. He will need a cage that is a minimum of 2’x2’x4’.
He will need lots of vines to climb around on and horizontal branches. Live plants will help maintain humidity and give him some places to hide.
I Can’t tell if you have a uvb light from your picture but he need a t5 or t8 linear 5.0 uvb bulb. As well as a basking bulb.
For supplements you will need 3 types.
A calcium WITHOUT phosphorus or d3 should be used with every feeding.
A calcium WITH d3. And a multivitamin. The d3 and multivitamin should be used twice a month.
For gutloading you should use
dandelion greens, kale, collards, endive, escarole, carrots, squash, zucchini, sweet potato, sweet red pepper, berries, apples, pears, melon etc.
Please read over the care sheet and health section.
https://www.chameleonforums.com/care/caresheets/veiled/
https://www.chameleonforums.com/care/