Guitar Pro 7.6 for Windows OS and macOS X.
Guitar Pro 7.6 allows you to hide or display the dynamics in your scores.
The dynamics are by default displayed with the Classic Style, but disabled with the Rock and Jazz style.
You can choose to hide or display the dynamics from the Stylesheet.
Access the Stylesheet from the File > Stylesheet menu.
Go to the Notation tab and enable/disable Hide dynamics.
Note that you will have to scroll down this window to access this option.