That’s kind of specific requirement, but right now there is no option to do it from WC Fields Factory, but you can via by handling woocommerce_order_items_meta_display
hook.
Here is an idea.
function hide_wcff_meta( $output, $order ) {
$html = '';
$formatted_meta = $order->get_formatted( '_' );
if ( ! empty( $formatted_meta ) ) {
$meta_list = array();
foreach ( $formatted_meta as $meta ) {
/* Here you can add as many as condition you want, depends on how many fields you wanted to hide */
if( $meta['label'] != "Your Fields Label" ) {
$meta_list[] = '
<dt class="variation-' . sanitize_html_class( sanitize_text_field( $meta['key'] ) ) . '">' . wp_kses_post( $meta['label'] ) . ':</dt>
<dd class="variation-' . sanitize_html_class( sanitize_text_field( $meta['key'] ) ) . '">' . wp_kses_post( wpautop( make_clickable( $meta['value'] ) ) ) . '</dd>
';
}
}
if ( ! empty( $meta_list ) ) {
$html .= '<dl class="variation">' . implode( '', $meta_list ) . '</dl>';
}
}
return $html;
}
add_filter( 'woocommerce_order_items_meta_display', 'hide_wcff_meta', 99, 2 );