Modify Social Networks field (Add WhatsApp link)

functions.php

<?php

add_filter( 'mylisting\links-list', function( $links ) {
    // Add new link
    $links['WhatsApp'] = [
        'name' => 'WhatsApp',
        'key' => 'WhatsApp',
        'icon' => 'fa fa-whatsapp',
        'color' => '#128c7e',
    ];
    
    // Remove a link
    unset( $links['Pinterest'] );
    unset( $links['DeviantArt'] );

    return $links;
} );