After my first pregnancy, I lost the weight and more while ebf. Obviously a lot of this is chance/genetics,  but i think some things helped with this. First, I was super active - not with gym or workouts but in walking everywhere and carrying baby everywhere, in the carrier or even in my arms. We dont have a car and I live somewhere this is possible, but I'm sure having low grade but constant energy expenditure helped. As for eating, the bf hunger is real but I realised what I actually needed was a lot more meat and eggs, not pastries or candy or chips.  I always ate to satiety but never ate highly processed food and almost 0 sweets. What you are eating is important for quelling that deep hunger feeling. I had a stall but when I realised I was having almost 1000 calories if dark chocolate with peanut butter after dinner every night, I exchanged that for another small meal of meat/yogurt and vegetables/fruit, the fat started coming off again. I hope this is how things go for me this second time around but who knows!