Sections removes the page title as it was designed to be a very simple page builder.
The simplest solution is to manually add the page title in the first Section of your page.
Alternatively create a Header Element and just add the {{post_title}} template tag to its content. Then set the display rules to the pages you’re using Sections on:
“Alternatively create a Header Element and just add the {{post_title}} template tag to its content. Then set the display rules to the pages you’re using Sections on:”