You can use any layout design as your collapsible content by using Elementor templates in the Unfold widget from The Plus Addons for Elementor. With this method, you can come up with unique collapsible sections.
To check the complete feature overview documentation of The Plus Addons for Elementor Unfold widget, click here.
Requirement – This widget is a part of The Plus Addons for Elementor, make sure it’s installed & activated to enjoy all its powers.
To use an Elementor template as a collapsible panel, first, you have to create and save the template in Elementor.
Then add the widget on the page. If you want, you can add a title in the Title field, and after that, choose Template from the Select Source dropdown.
Then choose your Elementor template from the Elementor Templates dropdown.
This is how easily you can use any Elementor template as your collapsible section content.
Also, check How to add Read More Toggle Button to Text in Elementor.