Hi,

This theme is a powerful WordPress theme - it supports 3 ways to setup the homepage. On some demos, we're using Customizer ( like other free themes on WordPress.org ) to set up the homepage and that's why you can't find the "Homepage" on the "All Pages".

You can find more about this on the documentation for Soledad theme here

If you want to use a static page to set it's the homepage, you can easy to do that by using Elementor or Import it from Soledad Cloud Library Blocks/Templates.

Best Regards,

PenciDesign