To create the Blog Page, you must first create a new page. You can do this by going to Pages > Add New. You can give a name of your choice. Select the “Default Template” and click on “Publish”.
The content of Blog Page page is not visible in the front end.
Once you created your new Blog page, navigate to Settings > Reading and set up the “Front page displays” setting. Select the static page option and choose the page you just created as your Post page.