Making someone with ADHD inhabit an open plan office is cruel and unusual punishment. Hell, it is so for any knowledge work without ADHD. That has been known ever since the Peopleware book came out so many years ago. Let these folks work at home.
I've got ADHD and actually found the opposite for me. Work from home was disastrous because there are so many potential distractions at home, and little accountability. I would see some dust and go get a broom to sweep, or go brush my teeth in case I forgot, or get food, or take "just five minutes" (soon 30) to check social media, or decide I need to make my bed. Any frustration or roadblock meant I would find something to derail me, and this all contributed to depression that made it even harder to focus on work.
Going back to the office was a huge boon for me, even before starting medication. I'm currently the only person on my team working 100% from office, and I would walk barefoot over broken glass to my open plan office before I would ever willing return to working from home.
I'm not sure if you've got ADHD; I know there's a lot of variation in personal experience. I've heard similar sentiments from multiple people with ADHD regarding working from home, although I think I'm a bit of a freak for tolerating open plan offices well.