Cannot get page content to appear in template

Hello! I'm running Wordpress 6.1.1. I've edited the header and footer of the "Single Page (No Sidebar Full Width)" template, but when I apply it to the page (selected in the "template" drop down menu in the page's "quick edit" option, the content doesn't appear. Right now the template has a header and footer section. I tried inserting a "Page content" block in between the header and footer, thinking maybe I needed a placeholder for the content, but that didn't help either. When I preview the page, all I see is the template - just a header and footer with nothing in the middle. Am I missing something? Thanks!