@prayagnao and @langleyint: Looks like you have edited the Page template instead of editing the page content for your page content. Now, you need to clear the customization on the page template. For that, go to “Appearance => Editor => Templates” and click on “Pages”. Now you are in the Page Template Editor section. So, from here click on the Action button (3 Vertical Dotted line), once you click on the Action button, the clear customization button will show, and click on it to clear the template customization. See this screenshot https://cldup.com/tKZhf8ljQN.jpg.
Note: To edit the page content, please edit the page either from the “Edit Page” button from the Admin Bar or from the Dashboard go to “Pages => All Pages” and click on the page that you want to edit.
Template editing is just for the design and layouts and not for the content editing.