Hello,
Thank you for contacting Rank Math and sorry for any inconvenience that might have been caused due to that.
I have just tested the affected page on online AMP test but the schema data is valid as you can see below:
Please let me know if I am missing something.
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.