Well done on the weight loss! I was about 82 or 83kg at the end of my recent pregnancy and then still eating keto/low carb mostly after the birth and while breastfeeding I was down to 72kg by 2 months, but now I'm 73 - 74kg again. Some of it is water weight I think because any day I eat a few extra carbs, I'm always a kilo heavier again. And the boobs! Well, before or after breastfeeding is another kilo difference! ha ha
Did you have T2 or Gestational diabetes?
And were you diagnosed in pregnancy or before?