Hide QR code from email if event has virtual event url

example.php

<?php

add_filter( 'tribe_tickets_plus_qr_enabled', function($enabled, $ticket) {

    if ( ! isset( $ticket['event_id'] ) ) {
        return $enabled;
    }

    $event = tribe_get_event( $ticket['event_id'] );

    $is_virtual = get_post_meta( $event->ID, '_tribe_events_is_virtual', true);

    if ( ! $is_virtual || '' === $is_virtual ) {
        return $enabled;
    }

    return false;

}, 10, 2 );