Other than the "Dash to Panel" extension mentioned by another user, you can also use the "Dash to Dock" extension to get pinnable taskbar (can be set to always

Other than the "Dash to Panel" extension mentioned by another user, you can also use the "Dash to Dock" extension to get pinnable taskbar (can be set to always visible / auto hide). I no longer use them though (to get more screen space)