The pellets are generally not recommended because the ingredients used are corn, soy and animal and vegetable by-products and sometimes they are bird foods repacked for sugar gliders.
If any pellet has those listed, I would choose not to feed it.
I have found 2 pellets that are for gliders and are glider vet approved that you can get from SunCoast sugar gliders. If you really want to feed a pellet.
I use the 'Wholesome Balance Chicken and Brown Rice' pellet that is all human grade food ingredients. I give them a pellet or 2 each every few days as a snack for dental health. (If I left them in the cage they would choose to eat them over their dinner I want them to eat at night). The other one is call 'Zoo Keepers Secret' but it is a soft crumble type pellet and needs to be tossed every other day, as it dries out and they probably won't eat it(mine didn't when I used it for a while) but since it's soft it doesn't provide any dental benefit.
If your gliders are on a good nectar replacement staple diet(like HPW) and fresh/frozen fruits and veggies...they do not need the pellets as part of a staple diet and it will throw off the Calcium and phosphorus balance of their diet if they are eating them daily.
The other treats you listed are plenty good to keep some around in foraging places if they wanted a daytime snack.
My gliders never get up during the day to eat or drink. I wake them up to check on them after they go to bed for the day and give them a "bed time"snack.