Conditionally hide or show woocommerce product variation in fontend by custom field

I ultimately solved this by manipulating the $options array. See full code below for conditionally hiding a product variation by a custom field, and display variations as radio buttons. Solution marked with comments

/**
* Convert WooCommerce variation dropdown to radio buttons.
*
* @param string $html Original dropdown html.
* @param array  $args Arguments.
*/
function ac_variation_radio_buttons( $html, $args ) {
$options   = $args['options'];
$product   = $args['product'];
$attribute = $args['attribute'];
$name      = $args['name'] ? $args['name'] : 'attribute_' . sanitize_title( $attribute );
$id        = $args['id'] ? $args['id'] : sanitize_title( $attribute );

if ( empty( $options ) && ! empty( $product ) && ! empty( $attribute ) ) {
    $attributes = $product->get_variation_attributes();
    $options    = $attributes[ $attribute ];
}

// Output original dropdown element.
echo $html;

/**** ADDED CODE *****/
//Remove wholesale products for regular users
if($product->is_type( 'variable' )){
    $user = wp_get_current_user();
    if(!in_array('fretagskund', $user->roles)){
        foreach ( $product->get_children() as $child_id ) {
            $variation = wc_get_product( $child_id );

            if ( ! $variation || ! $variation->exists() ) {
                continue;
            }

            if(get_post_meta($variation->get_id(), '_wholesale_checkbox', true) === "yes" ){
                $attribute_name = get_post_meta($variation->get_id(), 'attribute_pa_storlek', true);

                if ( in_array( $attribute_name, $options, true ) ) {
                    $options = array_diff($options, array($attribute_name));
                }

            }

        }
    }
}

/* Create custom radio input list */
$html="<section for="" . esc_attr( $id ) . '" class="ac_variation_list_block">';

if ( ! empty( $options ) ) {
    if ( $product && taxonomy_exists( $attribute ) ) {
        // Get terms if this is a taxonomy - ordered. We need the names too.
        $terms = wc_get_product_terms( $product->get_id(), $attribute, [
            'fields' => 'all',
        ] );

        foreach ( $terms as $term ) {
            if ( in_array( $term->slug, $options, true ) ) {
                $html .= '<section class="ac_variation_option">';
                $html .= '<input id="' . esc_attr( $term->slug ) . '_v" type="radio" name="' . esc_attr( $name ) . '_g" value="' . esc_attr( $term->slug ) . '" ' . checked( sanitize_title( $args['selected'] ), $term->slug, false ) . '/>';
                $html .= '<label for="' . esc_attr( $term->slug ) . '_v"><span></span>' . esc_html( apply_filters( 'woocommerce_variation_option_name', $term->name ) ) . '</label>';
                $html .= '</section>';
            }
        }
    }
}

$html .= '</section>';

echo $html;
}


add_filter( 'woocommerce_dropdown_variation_attribute_options_html', 'ac_variation_radio_buttons', 10, 2 );