Well, you learn something everyday.
Here’s my solution for loading parent theme’s RTL file after the main stylesheet, and then including my own additions:
function royeyal_enqueue_styles() {
if ( is_rtl() ) {
wp_enqueue_style('parent-theme-rtl', get_template_directory_uri() .'/rtl.css');
wp_enqueue_style('local-theme-rtl', get_stylesheet_directory_uri() .'/css/rtl.min.css');
}
}
add_action('wp_enqueue_scripts', 'royeyal_enqueue_styles', 100);
Thanks Tom!