The tank is fine, it jus needs more branches and greenery. Fake plants work fine and these are the vines I use bc you can bend them to whatever shape: https://www.amazon.com/Fluker-Labs-SFK51019-Branch-Habitat/dp/B0009YEB52/ref=mp_s_a_1_4?dchild=1&keywords=fluker+vine&qid=1626741179&sprefix=fluker+vi&sr=8-4
I absolutely love the Fluker's bendable vines. They're relatively inexpensive and you can do so much with them. I like to use cork bark too if you can find it for cheap somewhere in your area. I would love to tell you I'm some master at creating beautiful vivs but I really just kinda throw some stuff together and my crestie seems to like it lol.
I'd get these instead. Dirt cheap and good quality. I like them a lot, they look great in my tank and my gecko loves them
Here you go. I got a medium and two small
They have some on Amazon.... here's the link, hope it's helpful 🤗https://www.amazon.com/dp/B0009YEB52/ref=cm_sw_r_cp_apa_glt_fabc_CXHHQRREVP7D8RZSYCYJ
In finality here, I say get rid of those vines, get ones like this.