You’ve done your research!

Your husbandry looks great!

I do of course have two suggestions. You can add a bit more produce to your feeder’s diet and cut back a bit on the fruits. Different squash types, sweet potato, bell pepper and different greens (arugula, mustard, turnip, dandelion - avoid kale & spinach) are all great additions. Some will blend it all together and freeze it as small cubes, which saves time and no waste. Adding a graphic below.

My other suggestion is to lower your basking temps to 80 or just below. Little ones that young can get over-heated and dehydrate, and we never keep our girls hotter than 80 when adult. If you are able to raise your basking light just another inch or so, that should bring your temps to the perfect zone.
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Now I do have a couple of other suggestions, but they are mostly just sharing ideas. It’s hard for me to tell how you’ve been able to hang your branches and how you’ve hung the plant has me totally baffled. I’m guessing you’ve made a scaffolding type support from branches. A couple of other things you can do, which will provide more support are Dragon Ledges
https://dragonstrand.com/dragon-ledges/ or garden trellis attached to the frame of the enclosure. For both of these, they are easiest to install when the enclosure is not put together. But, if you have someone to help you, you could maybe attach the trellis without taking everything apart. After cutting the panels to the size needed (measure each panel on the inside), I sand any sharp edges until dull, drill tiny holes where I need to attach and then do so with thin wire. I do attach to at least one of the screws so it won’t slide down. I initially was afraid I’d hate the white trellis, and while it does come in different colors, my local stores only had white. Surprisingly I like the look of it.
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To go back to Johanna/John’s gender - have you checked the back heels for tarsal spurs? Females will have a hint of them, but they are prominent and usually can’t be missed on the males. Males will also have the vertical patterns starting to show by around month 3 and their casque will also be getting taller. Below is what my guy looked like when he was around 3 1/2 months old.
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With Jackson’s, the care is similar, but you’ll give the ReptiVite with D3 only once a month and they do need a decent temp drop at night to around the. 60’s and with a humidity boost too.
Hope I’ve been of some help, but really you’re doing great!