Premium Contact Form 7 widget for Elementor is a dependent widget. So you need to have Contact Form 7 plugin installed and active on your site in order to find Premium Contact Form 7 widget on Elementor editor panel.
Improve User Interaction and Site Speed with Elementor AJAX Search Widget and Premium Addons Updates
The recent update of Premium Addons for Elementor has brought notable enhancements to both its Free version 4.10.29 and PRO version 2.9.15.