Adjusting Window Mode Settings
You can customize how Parallels Desktop appears and behaves when in Window mode.
Set Whether Windows Applications Show in the Dock
You can choose whether or not to show icons for Windows applications in the macOS Dock when in the Window mode. If you prefer to work with applications by manipulating them on the Windows desktop, you may not want to be distracted by seeing them in the Dock alongside your macOS application icons.
Do one of the following:
Click the Parallels Desktop icon in the menu bar and choose Configure.
If the Parallels Desktop menu bar is visible at the top of the screen, choose Actions > Configure.
Click Options and then click Applications.
To show Windows application icons in the Dock when in Window mode, deselect Show Dock icons in Coherence only.