Hello,
Thank you for contacting Rank Math and bringing your concern to our attention. I’m sorry for the delay and for any inconvenience this issue may have caused you.
Unfortunately, you may need to add all the blocks to the post using the block editor (Gutenberg Editor) and then switch to the WordPress Classic Editor. Or, add the content you were planning to add with the Classic Editor using the Classic Block.
You can also check this link for more information:
https://rankmath.com/kb/faq-schema-block/
I hope that helps. Thank you, and please don’t hesitate to contact us if you need further assistance.
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.