Oh yeah when you are recovering from Anorexia or Bulimia you definitely don't need to eat 5k calories per day. That's insane and batshit crazy. Actually, I wish more professionals should address that weight has little to do with eating disorder recovery.
My own experience: I was heavier when I was Anorexic and Bulimic. I didn't need to eat tons of calories to recover. I needed a dietician and a therapist to do so. As years passed by I stopped being body and food obsessed and diverted my mind into hobbies, people, and my career. When you are recovering from ED, if you are only focused on the physical aspect, you won't recover because it's a MENTAL disorder and it has to be treated mentally too. The problem with most people like Stephanie is that they think recovering physically only without any professional help or consent will magically make ED go away (and btw she is still disguising her ED as "long starvation" or whatever bullshit she calls it).
She will never seek professional help cause she is still delusional that her all-in worked yet she is going back to her pre-all-in body because she is still mentally stuck with food and body image obsession.