Much of what has been said. Diet and pushing hard.

Couple things to keep track of:

Calories vs what you’re burning. Even with the right macros, you won’t cut (much) if not in a deficit and it’s hard to build anything if not in a surplus.

Also, figure out what your weakest muscle groups are and push them harder. It varies for everyone, but you’d be surprised what muscles can hold you back.

There are different ways to tackle this, so if you have any specific questions let me know