Will pruning or anything else fix this leggy pepper plant? Hoping to get it to start bushing and branching out.

I think my plant is starting to get leggy due to delayed transplant. They were in solo cups with holes for drainage just until they were 6-7 inches shorter than they are now. If possible I’d really like to save these pepper plants they have a bit of a story behind them. These plants are descendants of pepper plants from before 9/11. They are a few generations of plants down but the original pepper plant was involved in 9/11. The original plant resided in a building adjacent to the World Trade Center. So my Brothers Wife’s father used to work in that building and was gifted the original hot pepper plant by a nice lady, one of his coworkers. He was not in the city or working the day of 9/11 but later went back when his company said it was safe to collect their belongings as the building was deemed unsafe to continue working in and had to have major repairs done. When he went back he saw the plant on his windowsill still standing but dead. There was one small dried up red pepper still hanging on one of the branches. He took that pepper home, took the seeds out and planted a few. He’s been raising multiple generations from that one plant since then. And that’s where my plant came from. His plants are still alive so I can always ask him to send me some more seeds from his plant or from his stash of dried peppers or from my brothers wife’s plants. But I would really love to salvage this plant. Thanks for reading my story and for any suggestions you may have. I do find it very cool and interesting to have a descendant of a plant from that event.