How to Create Post Gallery Widget by Element Pack
You can understand from this tutorial, how to create post gallery widget by element pack
For more details about this elementor addon please look here: https://goo.gl/Ek93Cv
For more demos about this elementor addon please look here: https://goo.gl/kFQQFo
[Note: You need to install Elementor Core Plugin for run this addon, but not mandatory pro version.]