Hestia Frontpage Sections Disappearing
If you are using the Hestia theme, and the front page settings aren't available, there are three things that can be checked.
The front page option
From your website Dashboard, navigate to Settings -> Reading, and choose the option A static page option.
After that, choose an empty page as Homepage, and another empty page as the Posts page. The theme will automatically overwrite those empty pages with the front page sections and its layout design for the blog page.
The page template
After following the above steps, edit the page set as home and make sure to have the Default template chosen.
Edit the one set as Front Page.
The Customizer option
Please make sure the front page sections aren't disabled from Dashboard -> Appearance -> Customize -> Appearance Settings -> General Settings - Disable Frontpage Sections.
That's it! The front page sections will be visible now.