tribe-ext-v2-single-event-json-ld.php

<?php
/**
 * Plugin Name:       The Events Calendar Extension: Missing Events Single JSON-LD
 * Plugin URI:        https://theeventscalendar.com/extensions/---the-extension-article-url---/
 * GitHub Plugin URI: https://github.com/mt-support/tribe-ext-extension-template
 * Description:       Makes sure JSON-LD is present on Single Event for V2.
 * Version:           1.0.0
 * Author:            Modern Tribe, Inc.
 * Author URI:        http://m.tri.be/1971
 * License:           GPL version 3 or any later version
 * License URI:       https://www.gnu.org/licenses/gpl-3.0.html
 * Text Domain:       tribe-ext-v2-single-event-json-ld
 *
 *     This plugin is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     any later version.
 *
 *     This plugin is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *     GNU General Public License for more details.
 */

add_action( 'wp', function() {
	if ( ! class_exists( 'Tribe__Events__JSON_LD__Event' ) ) {
		return;
	}

	if ( ! class_exists( 'Tribe__Events__Main' ) ) {
		return;
	}

	// Check if we are in a single page.
	if ( ! is_singular( Tribe__Events__Main::POSTTYPE ) ) {
		return;
	}

	$context = tribe_context();

	// One more check for our Post Type.
	if ( ! $context->is( 'tec_post_type' ) ) {
		return;
	}

	// Bail when that action already exists.
	if ( has_action( 'wp_head', [ Tribe__Events__JSON_LD__Event::instance(), 'markup' ] ) ) {
		return;
	}

	// Print JSON-LD markup on the`wp_head`
	add_action( 'wp_head', [ Tribe__Events__JSON_LD__Event::instance(), 'markup' ] );
} );

Download Extension Link:
https://s3.theeventscalendar.com/uploads/2020/02/tribe-ext-v2-single-event-json-ld.1.0.0.zip