The Events Calendar: v2 Views: Include the next 3 upcoming events after each post unless it's a TEC post or archive.

functions.php

<?php

/**
 * The Events Calendar: v2 Views: Include the next 3 upcoming events after each post unless it's a TEC post or archive.
 *
 * Tested working with TEC v5.1.1.
 * Outputs a portion of v2's List View's HTML rendering without full styles/scripts.
 * But this isn't the best way to use v2's views. For a lot of scenarios, it's better to just create your own new view.
 *
 * @link https://gist.github.com/cliffordp/9994cf05f6475922f451eaeacef2cd3c This snippet.
 * @link https://github.com/mt-support/tribe-ext-events-happening-now A more recommended way to customize v2 views or craft your own.
 *
 * @param string $content
 *
 * @return string
 */
function cliff_add_tec_v2_list_view_on_post_loop( $content ) {
	if (
		! function_exists( 'tribe_events_views_v2_is_enabled' )
		|| empty( tribe_events_views_v2_is_enabled() )
		|| ! class_exists( '\Tribe\Events\Views\V2\Views\List_View' )
		|| ! function_exists( 'tribe_is_event_query' )
		|| tribe_is_event_query()
	) {
		return $content;
	}

	// Get next 3 upcoming events.
	$events = tribe_events()
		->where( 'starts_after', 'now' )
		->take( 3 );

	// Get the List View template class.
	$template = new \Tribe\Events\Views\V2\Template(
		new \Tribe\Events\Views\V2\Views\List_View()
	);

	// Build the output.
	// Based on the-events-calendar/src/views/v2/list.php
	$list_html = '';

	foreach ( $events as $event ) {
		$list_html .= $template->template(
			'list/event',
			[ 'event' => $event ],
			false
		);
	}

	if ( $list_html ) {
		$list_html = sprintf( '<div class="tribe-events-calendar-list">%s</div>', $list_html );
	}

	return $content . $list_html;
}

add_filter( 'the_content', 'cliff_add_tec_v2_list_view_on_post_loop' );