HI Eliana,

1. In each page > Page Settings > SEO > Open Graph
2. For custom Schema.org - you can use RAW HTML addon or extension Google Structured Data that has integration with SPPB.

Raw HTML: This is only for raw HTML code, do not use JavaScript or PHP code there. Also, iframe can be disabled because of security reasons. Yes, you can use style=" " with custom CSS. Some features of Raw HTML will only work for users with the “unfiltered_html” capability. https://www.joomshaper.com/documentation/sp-page-builder/raw-html

it's a shame that in such a complete software for creating websites there is no possibility to manage Google Structured Data

You can use also AnyCode module then select it inside Module addon.

I assume that in next year update we will add that too.