So you don't dust the insects with supplements before feeding them to the chameleon?
Do you have a UVB light on the cage?
Since most feeder insects have a poor ratio of calcium to phosphorous its important to dust the insects with a phosphorous-free calcium powder just before feeding them to the chameleon to make up for it.
Also recommend that you dust twice a month with a phosphorous-free calcium/D3 powder to ensure that the chameleon gets some D3 without overdosing it and leaving the chameleon to produce the rest of the D3 from its exposure to the UVB light.
We also recommend that you dust twice a month with a vitamin powder that contains a beta carotene (prOformed) source of vitamin A. PrOformed sources of vitamin A cannot build up in the system and lead to overdoses like prEformed sources can and will leave it up to you to decide whether the chameleon needs prEformed or not.
It's important to feed / gutload the insects with a wide assortment of greens such as collards, escarole,endive, dandelion greens, kale, etc and veggies such as carrots, sweet red pepper, squash, zucchini, sweet potato, etc. Regular lettuce is good for moisture but not much else.
Appropriate temperatures allow for proper digestion and thus indirectly in the nutrient absorption....so make sure your basking and cage temperatures are in the right range for the species you're keeping.
Hope this helps.
Hope she lays the eggs for you. If she starts digging, don't, etc her see you watching her while she is digging. It can make her abandon the hole.