Schema Pro allows you to Add Schema Markup on Subcategories of a parent category.
You will need to use bsf_target_rules_include_parent_taxanomy filter to be able to Add Schema on Subcategories.
Example: Add the following code to your functions.php file.
add_filter( 'bsf_target_rules_include_parent_taxanomy', 'my_function' ); function my_function( $bool ) { return true; }
It will apply parent category schema’s on subcategories.