Hello,
Thank you for contacting Rank Math today.
The FAQ schema option is currently only available when editing in the Gutenberg block editor and it is not possible to add a custom template to add the markup.
Please take a look at this page for more info on this : https://rankmath.com/blog/faq-schema/
Looking forward to helping you. Thank you.
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.