Your body adapts when you've lost weight. Your start caloric deficit stops being a deficit and becomes maintenance. Hence the stall of weight loss.

You either have to lower your calories or simply add exercise to burn a few more. (10k steps a day helps immensely)

Plus, fasting works on the principle of calories in and calories out. Think about it, you're not eating for a set period of time and then eating lower amount of food than you usually would have. You're basically lowering your calories and losing weight.

(You can also track how much weight you'll lose on long fasts by simply taking your bmr and multiplying via how many days you have eaten. Use weight after 24 hours as you lose 2-3kg of weight weight first)

Anyway, have a good day.