One of the features of Sydney Pro is the “Extra Elementor Widgets”. We have included extra widgets and layouts like pricing tables, menus, and timelines, apart from the widgets provided by the free Elementor plugin.
Here is the list of Extra Elementor Widgets that Sydney included in the Pro version: https://athemes.com/sydney-features/#elementor
You can find those widgets under the Sydney Elements section:
However, please note that Sydney Pro will not activate the Elementor Pro widgets:
You will still need to install the Elementor Pro (paid) plugin to be able to use those Pro widgets.
You will notice that some, although not all, widgets in Elementor Pro can be found in Sydney elements.