Widget shortcodes are a feature in The Events Calendar PRO. In other words, the shortcodes are meant specifically for the widgets that come with PRO and need to have PRO installed in order to be used. WooCommerce Tickets unfortunately does not come with shortcodes of its own.
Sorry for the bad news, but does this help answer your question?
I should add that you can add an Event List widget to an page with a registered sidebar area in WordPress. You can find the Event List widget in Appearance > Widgets.