Install gnome-shell-extension-taskbar by entering the following commands in the terminal:
sudo apt update sudo apt install gnome-shell-extension-taskbar
Description:
TaskBar Extension for GNOME Shell
TaskBar displays icons of running applications on the top panel or alternatively on a new bottom panel. Activate, minimize or close tasks with a simple click. TaskBar is a dock-like windows list on the top/bottom bar.
Homepage: https://extensions.gnome.org/extension/584/taskbar/
Version: 57.0-1
Section: universe/gnome