How did you lose weight postpartum?

I was 55kg, 160cm before my first pregnancy. I used to workout, play soccer, walk everyday. Then after I gave birth I became 60kg and stayed there until my second pregnancy a year later. Now I am 1 month postpartum at 67kg. Everytime I look at my body I get so depressed. But I am also breastfeeding and literally every source out there recommends to not do heavy excercises or dieting. Do I just have to deal with hating my body for like the next 6 or so months? My self esteem is really taking a toll.