If your muscles are burning massive amounts of fat and sugar then you can eat more fat and sugar.
The body adapts to get better at using fuels when it’s pushed to the limits.
Dense Strength & CrossFit style training are two of the methods that I’ve seen consistently transform body composition.
High volume calisthenics training is also great.
Using sled work or hiking hills for fat loss allows concentric only, low structural damage fuel burning! This is great if muscle gain isn’t a priority and fast fat loss is desired.