I have two sugar gliders that are not gaining weight. My male, Mushu, is 90 g as of tonight. He was 94g last week. He is also almost two and has been checked by a vet and nothing is wrong. My female, Nala, is currently 52 g and she was 54g last week. She has also been the to vet and nothing is wrong. She is only about 6 months old. I've never had a glider as young as she is so I'm not sure how much she should weigh. They are both in separate cages and I feed the BML staple diet along with fruits and veggies and a couple of mealworms. Am I worrying too much? Does anyone have any suggestions to help them gain some weight?

I would increase the number of mealworms they get, as they are fatty.
you could get raw honey and see if they will eat some as a snack.
yogurt drops are high sugar content and fattening I'm told.

but unless they are 160 grams plus, my gliders as adults don't lose
much wieght. I have a few normal sized then a few obese and a few full
sized (160gram) males. and their weight has mostly stabilized.