You can go to Settings / Reading choose post page default:
Step 1 - Log in to your WordPress Administration Panel (Dashboard).
Step 2 - Click on Pages > Add New.
Step 3 - Give your page a name then Change the Editor to Backend Editor ( you need to have the Elementor plugin activated ).
Step 4 - Click on the Edit with Elementor button
Step 5 - Select the WordPress widget.
The Front-end looks like :
From your admin Dashboard navigate to: Appearance > Customize > Blog
You can choose Left Sidebar or Right Sidebar.