I would like to remove these icons shown in the picture circled in red but i quite don't know how?
In order to remove the icons show in the taskbar, right-click your taskbar > Taskbar Settings.
Go to the section "Notification Area" and click on "Select which icons appear on the taskbar":
It will open a window with all your taskbar icons and you can disable them that way.
To remove system-related (network, Windows Defender, sound, etc.) icons, the procedure is the same but the option to choose is "Turn system icons on or off"
Note that the application is still running on the background after disabling its icon.