If you click a single post, I’ve removed the widgets from my sidebar. But, I want the right sidebar to remain without content. So, I want to keep the right sidebar (blank, no content).
You can override the default content by adding a blank Custom HTML or Text widget to your right sidebar widget.
Here’s a demo video of adding a blank text widget to the right sidebar widget to make the right sidebar display nothing. https://share.getcloudapp.com/lluY8Y4n