Custom Breadcrumbs in SEO Title

Hello!

I’m trying to create a custom breadcrumb trail to add to the Yoast SEO title and meta description of my WooCommerce product categories. I’ve customized the /woocommerce/templates/global/breadcrumb.php file in my theme folder and have the following in my functions.php file. However, the code prints the breadcrumb list several times and outside the <title></title> tags.

Please advise as to the best way to fix this, thanks!!

add_filter( 'woocommerce_breadcrumb_defaults', 'diy_woocommerce_breadcrumbs' );
function diy_woocommerce_breadcrumbs() {
    return array(
            'delimiter'   => ' ',
            'wrap_before' => '',
            'wrap_after'  => '',
            'before'      => '',
            'after'       => '',
        );
}

add_filter( 'woocommerce_breadcrumb_defaults',function( $defaults ) {
    unset($defaults['home']);//removes home link.
    return $defaults;//returns rest of links
});

function get_diy_catlist() {
    return woocommerce_breadcrumb();
}

// define the action for register yoast_variable replacments
function register_custom_diyyoast_variables() {
    wpseo_register_var_replacement( '%%diycatlist%%', 'get_diy_catlist', 'advanced', 'some help text' );
}

// Add action
add_action('wpseo_register_extra_replacements', 'register_custom_diyyoast_variables');