This plugin adds new skin to Elementor Page Builder Posts and Posts Archive widget.
You can design a loop item just like a single template and it would be used as a skin so you can be able to create a post grid the way you like.
All you have to do is to create a Custom Grid Template and place the Post Item Widget (placeholder) in your template made with sections and columns, and why not other widgets.
This plugin is an addon for the free plugin Elementor Custom Skin and comes with extra features and customisation that will improve your design.