A loss of 9-10 kg after delivery is acceptable. You have lost a little more than that.
Please take some dry fruits, दादी मां का नुस्खा, पंजीरी and गोंद के लड्डू, some sweet every day, at least two eggs per day, and eat a little more than what you need. In addition, also do some outdoor activities.
You will have to keep a track of your blood
sugar levels every week for one month.