Hello @ken0429ng,
Thank you for contacting the support.
Yes, information is taken from the user profile and it is recommended to add it to validate the Schema and increase the chances of getting a rich snippet.
If you remove the author property, the Schema might not validate and you can get errors in your GSC account. However, if you still want to remove it, you can modify and use the following filter based on the Schema type you are using: https://rankmath.com/kb/filters-hooks-api-developer/#change-post-schema-data
Here is how to add a filter to your site: https://rankmath.com/kb/wordpress-hooks-actions-filters/
Hope that helps.
