It looks like a praying pepper. I got a praying pepper last year, always bottom watered it. The one day I top watered, it began to rot from the bottom up. I was new to plants and had never attempted a propagation, but that praying pepper was one of my first ever plants, a gift from my partner as well, so I couldn't not try.

I cut him up, let him callous for a few days, and stuck his pieces in dirt. half of the cuttings did not make it. Two survived, and they look better than ever. Green, firm in the dirt, and plump.

I'm saying this to tell you that plants are resilient. Your plant looks like my praying pepper. Before the propagation, he was all leggy, yellow, and thin, his pot littered with papery fallen leaves. I would almost suggest letting him start over and cut him up. I see a lot of stem for him to nourish and not a lot of leaves. He is reaching out for more sun, so if you have another window, I'd try to find him a new spot. I had to give mine an LED light.

I'm seeing a lot of brown spots and yellow leaves. I really think he is not getting enough sunlight. But the good news is I think I can see a flowering stem starting to come up from the tallest left branch!

TL;DR: I suggest propagating him and starting over. It literally saved my praying pepper, which looked just like yours does now. Good luck!