Hello,
Thank you for contacting Rank Math support today and bringing your concern to our attention.
Check the example page you shared, it seems that there’s a product schema that you can use in the Free version of Rank Math. Please refer to this guide: https://rankmath.com/kb/rich-snippets/#add-schema-posts-pages
However, if you wish to for a custom schema or add multiple schemas for a single page/post, you may need to check our PRO version: https://rankmath.com/offer/
Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.