the_content() article body the schema ?

Hello,

Thank you for reaching out to us.

We don’t have a variable in the plugin to add the entire content of the page but you can create one by adding the following filter on your website:

add_action( 'rank_math/vars/register_extra_replacements', function(){
    rank_math_register_var_replacement(
        'content_area',
        [
            'name' => esc_html__( 'Full Content', 'rank-math' ),
            'description' => esc_html__( 'Get the full content area', 'rank-math' ),
            'variable' => 'content_area',
            'example' => 'content_area_callback()',
        ],
        'content_area_callback'
    );
});

function content_area_callback() {
    $content = strip_tags(wpautop(get_the_content()));
    return $content;
}

The %content_area% variable can be used to get the full content in your schema.

Here’s how you can add filters/hooks to your WordPress site:
https://rankmath.com/kb/wordpress-hooks-actions-filters/

Let us know how it goes. Looking forward to helping you.

Thank you.