I've been through exactly the same thing - twice! That's why I think it is like a tick box exercise (although I am sure they would deny it). We didn't want to go back either, I was saying exactly the same things as you after the first meeting. In fact in the meeting I cried and said that it sounded as though the were accusing me of making this happen and abusing her. I told them I didn't need cconvincing. However, DD2 needed convincing that she was ill and she still isn't. I also said I knew I couldn't force my DD to eat, that I would try but it was up to her to find it in herself to do the eating.
DD2 still doesn't trust her therapist. Because of the eating disorder, not the therapist.
DD1 does trust her therapists now, and is now open to counselling, which she needs for depression and anxiety. When she found out how DD2's first appointment had been like, she told me that it was very hard to hear me say 'bad things' about her therapists at the start and how I didn't trust them. So that was a wake up call.
They need to lay it on that thick over and again to get through to a child with an eating disorder. Some parents don't understand the urgency of the situation. They listen to their child saying they are not ill and they can manage and want to give them 'a chance'.
With us, I had to sit with DD until she ate and she couldn't go to school (or get up and do something else, or have her phone) until she ate/eats it all. So try that and see if you can use the likelihood of being admitted to help your DD to eat this week. You could use the thought of admittance, say that you don't want that to happen, but that she needs to eat to stop it from happening. That it will take weeks of eating food as medicine to fully recover.
You can't force her, but you can use gentle persuasion. It sounds as if she does trust you so keep hold of that. I found taking control from the ed at the easiest part of the day, in the evening meal, worked for us. (Lunches too, sit together and prepare her something. I let my DDs prepare their own breakfasts at least for the first week but still sat with DD2. My two have very different personalities and I couldn't do as much for DD1, she wouldn't let me.)
We agreed on which plates and bowls we would use (not huge, not so small a sensible portion wouldn't fit, I had to be firm). Then we agreed on what foods would be on the menu, but did not talk in great detail. I wrote it all out on a timetable to help remind myself. I chwcked it for a balance of food groups and nutients, fkavours and variety dad to day. Working from the timetable then gave me enough credibility for them to eat what was prepared for them. If they wanted something else I could point out that they would be having the something else the next day, or I'd add it to the timetable.
Whatever works for you. I'm sure there must be families who are much more spontaneous and creative than us, and some who plan in much more detail. You can do this. You fed your DD when she was a toddler and obviously did a good job as she's grown up and done well. You can do this too.