Global settings
The global settings can be found under Appearance → Customize → Page Heading, here you can customize the colors and height.
Changes made here will be applied to the page heading section throughout the theme.
Individual page settings
If you want to make changes to per page (e.g. add a different background image) you can edit the page (not with Elementor) and at the bottom of the page you will see the page heading option field:
Within the “Settings” panel you can find the layout settings such as show/hide the element or set the page title alignment.
To add a custom background image you can add your image to the settings under the “Page Heading Background” tab.