First of all, you should learn to control your diet. You eat all the meat yourself, so you'd better eat less fatty food and more protein-rich food.
Secondly, it's best to keep going to the gym for exercise every day. There are many ways to remove fat from the chest, such as dumbbell lying flat exercise and bird exercise. Of course, not only the chest, arms and other parts can also be exercised. The effect of practicing in the gym is the most obvious, of course, you need perseverance to stick to it.
In addition, after the gym exercise mentioned in the second point above, run in the gym to relax and do aerobic exercise.
If you can stick to the above points, I believe that not only the chest fat will go down soon, but also the muscles will be preserved, and your body will be healthier!