Okay there is alot wrong with this setup.
Your lightings is wrong. The coil uvb is useless and the red heat light isn't good for them either. The other light is your basking fixture looks like a normal basking bulb, you can keep that if this is the case. If not, grab a 60-70 watt household bulb (no colors, just white or warm) to get the basking temps.
You are going to want to get a tube fluorescent uvb bulb, such as the reptisun 5.0, or the Arcadia 6% (NO COIL UVBS!! ) . You didnt give dimensions, but you will want it to run the length of as much of the enclosure as possible. You will also need a fixture to hold the bulb. I
think bulbs are always 2 inches shorter than the fixture, so for a 36'' fixture you would have a 34'' bulb (correct me if im wrong)
You need more branches. Personally, I would toss those dark (almost black) bendy branches and just go outside and collect some. Avoid anything with sap. Grab some of different widths (but dont get overly thin branches, they will break easily) and put them in the tub. Rinse with a bit of soap, then pour boiling water over them, then cold, then boiling, then cold, and dry. Make sure the branches aren't overly rough (taking the bark off would make them smoother, or sand them down a bit) as it looks like he has some scabs on his feet. You could also grab some bend-a-branches
https://www.amazon.com/Fluker-Labs-...?keywords=bend-a-branch&qid=1579288139&sr=8-3 As they may be softer on his feet.
You also need more plants. Panthers aren't known to eat too much vegetation, at least not nearly as much as veileds, so a few fake plants are fine. But to keep up humidity (mainly at night) live plants help alot. Pothos and schefflera are great choices that are legitimately at every lowes or home depot. Just repot with topsoil, cover the soil with 1'' stones and rinse off the leaves with warm water very well and you are set.
Throw out the waterfall and the weird grassy looking stuff you have on the cage floor, along with that hammock thing (just put some branches 8-12 inches under his basking light) Bare bottom is much easier to clean in my opinion.
For supplements, I would just get repashy LoD calcium plus (MUST BE CALCIUM PLUS!!) and just dust every feeding. Bee pollen is also a great addition.
I would get a fecal if you have never done so before, and I would also bring him in aswell to get his feet looked at. They look like scabs to me, or are they just coloring?