Add more schema properties

So, how do I add more schema properties (e.g., sameAs, alumni, honorificPrefix, knowsAbout, nationality, awards, etc) on top of what the SEO plugin is already doing?

I guess that would depend on the specific SEO plugin?

I’ll advise you to ask your question in the specific SEO plugin’s own sub-forum, so the plugin’s developer and user community can help you out. (Find the plugin at https://wordpress.org/plugins/ and click on the “Support” tab for that specific plugin.)

Good luck!

With hundreds of schema types and subtypes, it’s quite understandable that no single plugin — not even dedicated schema plugins — can support them all, hence the need for custom development to add unsupported types.

If you need new schema types added to these existing SEO plugins, then your only choice left would be to hire a developer to code it for you: https://jobs.wordpress.net/

Alternatively, you could take a look at some of the dedicated scheme plugins, as these are likely to support more schema types:

Schema – All In One Schema Rich Snippets:
https://wordpress.org/plugins/all-in-one-schemaorg-rich-snippets/

Schema: https://wordpress.org/plugins/schema/

Schema & Structured Data for WP & AMP:
https://wordpress.org/plugins/schema-and-structured-data-for-wp/

WPSSO Core | Complete Structured Data: https://wordpress.org/plugins/wpsso/

More: https://wordpress.org/plugins/search/schema/

Good luck!