Hello,
Thank you for contacting Rank Math and bringing your concern to our attention. I’m sorry for any inconvenience this issue may have caused you.
Could you please share the affected product URL so we can check as well?
Meanwhile, to disable the default product schema, head over to your WordPress dashboard > Rank Math > Titles & Meta > Products > Schema Type and set it to None

This will prevent the default schema from being applied to your products.
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.