Show only first variation dropdown product variable by id variation if user logged out - Woocommerce - Single Product Page

Show only first variation dropdown product variable by id variation if user logged out - Woocommerce - Single Product Page.php

<?php

/*
 * Show only first variation dropdown product variable if user logged out - Woocommerce - Single Product Page
 */

add_filter('woocommerce_after_add_to_cart_button','sei_partita_iva', 10, 1);
function sei_partita_iva(){
	if ( !is_user_logged_in() ) {
		echo '<div style="margin: 20px 0 20px 0;"><h4>Hai una Partita IVA? <a href="https://www.tittex.com/mio-account/?action=register" style="color:#dd3333; text-decoration: underline;" >Registrati</a> per visualizzare i prezzi riservati per te!</h4></div>';
	}
}

add_filter('woocommerce_dropdown_variation_attribute_options_args','fun_select_default_option', 1, 1);
function fun_select_default_option( $args ){
	
if ( !is_user_logged_in() || current_user_can('privato') ){
	
    foreach( $args['options'] as $key => $option ){
        if( $option === "1" ) {
			$args['selected'] = $args['options'][$key];
            
        }
    }
    	
}
	return $args;
}

/* --- */

add_filter( 'woocommerce_dropdown_variation_attribute_options_html', 'custom_woocommerce_dropdown_variation_attribute_options_html', 1, 2 );
function custom_woocommerce_dropdown_variation_attribute_options_html( $html, $args ){
	if ( !is_user_logged_in() || current_user_can('privato') ) {
    $product = $args[ 'product' ];
    $attribute = $args[ 'attribute' ];
    $terms = wc_get_product_terms( $product->get_id(), $attribute, array( 'fields' => 'all' ) );
    $options = $args[ 'options' ];
    if ( empty( $options ) && !empty( $product ) && !empty( $attribute ) ) {
        $attributes = $product->get_variation_attributes();
        $options = $attributes[ $attribute ];
    }

    foreach ( $terms as $key => $term ) {
		
        if ( in_array( $term->slug, $options ) && $term->slug != '1') {
			//if (in_array($options, '1')){
            $html = str_replace( '<option value="' . esc_attr( $term->slug ) . '" ', '<option hidden value ="' . esc_attr( $term->slug ) . '" ', $html );
        //}
		}
  echo "<pre>";
print_r($term);
echo "</pre>";
	}
}
    return $html;
}