Partner with disordered eating

Hey everyone I (18ftm) am looking for any advice for my partner (18nb) they have some issues with disordered eating and all I want to do is help. I feel useless when I see them so clearly in pain. I want to help them get better, they express wanting to get better sometimes so I’m obviously not forcing it. I don’t ever force or pressure them to do anything they don’t want to but we’re all worried about them and just want to see them happy with themself. I struggle with similar issues and I’m even at a loss we’ve discussed so many options but nothing feels right. Any suggestions or advice would be great.