Elementor supports both WordPress native widgets and dedicated Elementor add-on widgets.
WordPress Widgets: Any third-party plugin that adds standard WordPress widgets (the ones found under Appearance > Widgets in your WordPress site) will automatically show up in Elementor’s widget panel under the WordPress section.
Elementor Add-on Plugins: Plugins built specifically for Elementor (like Essential Addons or Ultimate Addons and more) register custom Elementor widgets directly into the editor panel, complete with native styling and layout controls.
In both cases, you can simply drag and drop the widgets directly onto your page layout.