I didn't take notice of the freeze-dried bugs or mealworms, this is a big no-no as well, as stated above by our other member. Freeze-dried bugs are basically like feeding them cardboard. They contain no moisture at all, and Beardies get their
hydration from the food they eat, most Beardies do not drink water out of a bowl or the
bath, but they rather just eat live insects and veggies for
hydration. So feeding them freeze-dried bugs and mealworms is not only dehydrating them and malnourishing them, but you will no doubt have impaction issues. Mealworms contain little protein and high fat, but the worst part is their outer shells (unless they just shed and look white or almost transparent) are very difficult for Beardies to digest, even if they are living in proper conditions. So your beardie has had no
UVB light for two months, probably has temperatures that are off, so he cannot digest his food or process any nutrition to begin with, and then he is being fed freeze-dried bugs and mealworms which are making it worse.
First thing is still getting him the Reptisun 10.0 tube UVB mounted inside his tank at a proper distance from his basking spot (depends on whether you get the T5 or the T8 tube, I'd recommend the T5 High-Output mounted inside his tank about 11 inches away from his basking spot alongside the basking bulb, he needs the High-Output UVB immediately).
Keep feeding him fresh greens every single day, no kale at all right no because that is leeching out any Calcium he might be absorbing by chance. Feed collard greens, turnip greens, mustard greens, endive, etc. (Use the list linked above), but please completely stop the freeze-dried bugs and the mealworms! You need to pick a live feeder insect like crickets, dubias roaches, Phoenix/Reptiworms/Calciworms/BSFL (all the same thing), Silkworms if you can get them, and dust them in Calcium w/D3 every day to start. Again, he will not absorb any of this until he is under the
UVB light!!! And I would be dripping water on his snout and letting him lick it off, as much as he will take, multiple times every day.
I guarantee he will perk up and start eating again within a day of getting him proper UVB lighting, please get this immediately for him, we are not trying to scare you or make you feel bad, but he's already very sick from not having any UVB for months and he will eventually get to the point where symptoms will not be reversible, like paralysis, spine curvature, etc....