opinions vary for sure
What I suggest is this:
for chameleons under 6 months, provide as much as they are able to catch and eat within 5 minutes, three times daily.
For chameleons 6 - 13 months, provide as much as they are able to catch and eat within about 5 minutes, once or twice daily. Adjust according to how active the chameleon is, how its body appears (tail /head) and its weight. It should be growing still during this time, especially at the beginning.
For adult chameleons, 1-3 bugs per day or equivalent. Fine to skip a few days. Most chameleons will reduce their intake according to their need. Females who you plan to breed will be treated and fed differently from those you wish to delay egg production in.
You can see examples of EXACTLY what my panther chameleons (very similar to veileds) eat here:
https://www.chameleonforums.com/blogs/sandrachameleon/food-diary/
(you'll have to go back a ways to older entries for examples that include babies and juvy age chams as I dont breed anymore)
termperature info:
https://www.chameleonforums.com/blogs/sandrachameleon/662-temperature.html