Ok so my feedback will be in red.
My chameleon: it’s a veiled chameleon, gender and age is unknown since i got it at petco, but it’s about 5 inches in body length so I assume it’s 3 months old
If the chameleon doesn't have spurs, it is a female, and by the looks of it, she doesn't seem to be 3m old, probably older.
handling: I handle it about once a day for around 5 mins or when I clean its enclosure
If you have just got her, I would recommend not holding her at all, this is very stressful for them.
Feeding: I feed it 5 mealworms twice a day, I hit load them with banana
Mealworms are not healthy for chameleons, try some crickets, dubia roaches, BSFL, etc.
supplements: I dust the mealworms I’m about to feed it with calcium once a day and dust them with vitamins twice a week
Make sure that the calcium you are feeding her everyday doesn't have D3. Once every other week you should give her D3.
water: I use a waterfall with leaves that create humidity and dew,
You shouldn't use a waterfall because it is a hazard for bacteria, try misting instead.
fecal description: they are brown with white urates, I have not tested it for parasites
Try to get her tested for parasites because you got her from petco, they are not the best at taking care of animals.
cage: I have a mesh enclosure that’s 16 inch wide and 30 inch high
This sizez is okay for now, but eventually you need to move her into 2ft x 2ft x 4ft as a adult enclosure.
lighting; I use UBV lights ( one white one and one blue one) I have the white one on for half of the day then I turn on the blue one for the rest of the day
Do not use the compact UVB bulb get a linear one asap, your chameleon could get MBD which is not a fun thing to deal with. Also refrain from using a blue heat bulb, you can get white light ones from homedepot/lowes.
Tempature: it’s basking spot usually ranges around 85-90°F and it’s floor tempature is around 73-78 , I measure it with a tempature and humidity gauge
This is a bit hot, try raising the bulb up to get it down to 80-85 degrees.
humidity: it’s about 55-60%, in the tropical range the waterfall system I have combined with where I live maintains the humidity levels
That is a good range, but the waterfall system should be removed.
plants: I use fake plants
Get some live plants, in fact, try to have them all be live. Veiled's are notorious for eating plants, and with fake ones, she could eat them and become impacted.
placement: it’s not near any vents or fans, the top of the tank to my floor is about 6f 7.5in
This is a pretty good height! Good job!
location: I live in New York, United States
Ik it is hard getting a new pet, but with some work, I think your chameleon will be just fine!