How to show custom fields in modal in category page

Question

The code below shows the title and content in the modal popup in category.php file. The full tutorial can be seen here although not important: https://artisansweb.net/load-dynamic-content-on-bootstrap-modal-in-wordpress/

jQuery(function($) {
    $('body').on('click', '.view-post', function() {
        var data = {
            'action': 'load_post_by_ajax',
            'id': $(this).data('id'),
            'security': blog.security
        };
        $.post(blog.ajaxurl, data, function(response) {
            response = JSON.parse(response);
            $('#postModal h5#postModalLabel').text(response.title);
            $('#postModal .modal-body').html(response.content);
 
            var postModal = new bootstrap.Modal(document.getElementById('postModal'));
            postModal.show();
        });
    });
});

Having said that, I would like to show the custom-fields in the modal-body too. Currently, custom-fields are shown through this PHP code in single.php. How can I go about doing this?

<?php echo get_post_meta(get_the_ID(), 'Full Name' ,true ); ?>
<?php echo get_post_meta(get_the_ID(), 'Place of Stay' ,true ); ?>