Sanda belongs to aerobic exercise, while bodybuilding belongs to anaerobic exercise. Bodybuilding is three-point training and seven-point training. Through hard exercise, we can complete scientific training such as correct diet and promote muscle growth to the maximum extent.
Sanda is an expendable sport. Sanda will make muscles stronger, but it is still different from bodybuilding muscles.
So the Sanda athletes you see are muscular, but they are definitely not up to the level of bodybuilders.
At your age, practicing Sanda for six years is just exercise, and there will be no big breakthrough. I suggest you practice bodybuilding. Many master bodybuilding champions only started in their twenties, so you can get a good figure.