FAQ Schema for Elementor adds a widget to Elementor that inserts FAQ schema (structured data) in JSON-LD format, without rendering anything on the front-end. Widget can be found under General.
Do not use more than one widget to a page, add multiple FAQs to the same widget instead.
Tested on Elementor 2.8.5 – 3.0.14
This plugin is available for download for your site.