Hi,
I would like to create a custom action on left-click where a zip (or any other compressed) file can be extracted into a folder. Main requirement is left/single-click. As of now, it is Right-Click, Extract -> Extract Archive here, autodetect folder (2 clicks and menu traversal).

Is this possible?

Thanks.

Dolphin has a setting to enable opening zip (and other) archives as folders in Dolphin Settings > Navigation > Open archives as folder.

For quickly extracting the archive, you can drag-and-drop the archive into the same folder and then select Extract Archive from the pop-up menu.