I saw someone mention Mother Mother's "Body." They have a couple others I resonate with, though. (tbh they encapsulate in song a lot of my issues. such a good band.)
There's "I Go Hungry" which I really like, but my fave by them is, "Oh, Ana." Geeez, that song. It really hits home with playing God/craving that level of control and self harm. IMO, it also touches on how impossible any kind of permanent recovery feels. Not wanting anorexia to go away, missing it when it's gone, going back to it, ect. Ouch. Great song, though.