Theme add_theme_support "align-wide" not working?

I see in Cwicly’s theme functons.php settings. that add_theme_support(‘align-wide’); is present but there is no align icon on any block’s toolbar that support it or any classnames ‘alignwide’ or ‘alignfull’ being output in the HTML?

Is this disabled somewhere else? as I would like to use this feature for wide blocks etc.