That’s a nice sentiment but unfortunately the only way for this to happen is for you to make the tough decision tk start making changes if only to break the generational chain.
I saw your post that it may be a disease, maybe but you also admit that you eat very poorly females to your husband who is fit so maybe that’s a start, eating the same meals together and using your husband as a guide.
Also I mentioned therapy earlier, the fact you can’t speak about your weight without stressing suggests therapy may help to unlock the root cause, understand your relationship with food and how to manage it better, and how to help your daughter.
Saying you don’t want her to go through what you did without doing anything about it will not do much especially as you continue to model bad eating habits to her and dancing around her growing weight and her insecurities.
In summary, make wholesale changes to how you eat as a family, start being more active as a family, get therapy to help work through both your relations with food and weight insecurities and develop healthier habits, attitudes and mental strength.
Again doing nothing while wishing she will lose weight and not go through what you did wouldn’t achieve anything without action and unfortunately she will go through the same thing as it has already started and then her daughter will repeat and repeat and peeper until someone decides to make a change. I think that change can start with you.
The food changes don’t have to be drastic, start slowly by increasing vegetables and proteins and cutting carbs, start cutting sugars and sweet snacks etc.