When adding a new blog post or editing the tag/ category of an existing demo post, make sure that the Single Post global template is set accordingly. Otherwise, your post will look broken. Please check the examples and instructions below:
Here looking broken:
The blog post design is predefined by the Single Post global template. You can edit it in Dashboard > Templates > Theme Builder > Single Post
https://elementor.com/help/creating-a-single-post-template-with-elementor-pro/
You can also check this article: https://elementor.com/help/conditions/
Click on "Edit post" to manage tags and categories:
You can also check this guide: Vamtam Elementor Themes: Setting up Blog Listing Page and Blog Posts