Hi if you are using a theme that does limit the width of the articles/posts, then ASE components will be limited to the width set by the theme. Here is a guide that shows how to customize your theme to support full width.
There were some inquiries in past about enabling full width ASE components while using the themes that limit the width of the article. It’s technically possible, but there are many potential issues. For example, your theme may be using the rest of the horizontal space for other purposes. Should ASE simply cover those contents? There weren’t perfect answers. If you have some thoughts on this feel free to let me know.