Under isocaloric conditions, varying the ratio of dietary carbohydrates to fats has no significant effect on fat loss or total weight loss.

Study: Low‐carbohydrate versus balanced‐carbohydrate diets for reducing weight and cardiovascular risk

When people eat the same number of calories but one group eats fewer carbs and more fat, and another eats more carbs and less fat, they lose almost the same amount of weight. So, cutting carbs doesn’t help you lose more fat than cutting fat.

Study: Macronutrient composition and its effect on body composition changes during weight loss therapy in patients with non-alcoholic fatty liver disease: Secondary analysis of a randomized controlled trial.

When people eat the same number of calories, it doesn’t matter much if they get most of their calories from carbs or fat—they lose about the same amount of weight and belly fat. The study showed this by comparing two very different diets and finding no real difference in results.

Study: Effects of Diet Macronutrient Composition on Weight Loss during Caloric Restriction and Subsequent Weight Regain during Refeeding in Aging Mice

When mice ate fewer calories, they lost the same amount of weight no matter if their food was high in carbs or high in fat. This means, when eating the same number of calories, changing carbs and fats doesn’t change how much weight you lose.