Recurring Events – show only one instance in the_loop

maybe this sample snippet can help and give you an idea –

function my_em_wp_query(){
	$args = array(
		'post_type' => 'event',
		'posts_per_page' => 100,
		'meta_query' => array( 'key' => '_start_ts', 'value' => current_time('timestamp'), 'compare' => '>=', 'type'=>'numeric' ),
		'orderby' => 'meta_value_num',
		'order' => 'ASC',
		'meta_key' => '_start_ts',
		'meta_value' => current_time('timestamp'),
		'meta_value_num' => current_time('timestamp'),
		'meta_compare' => '>='
	);

	// The Query
	$query = new WP_Query( $args );

	// The Loop
	while($query->have_posts()):
	$query->next_post();
	$id = $query->post->ID;
	echo '<li>';
	echo get_the_title($id);
	echo ' - '. get_post_meta($id, '_event_start_date', true);
	echo '</li>';
	endwhile;

	// Reset Post Data
	wp_reset_postdata();
}
add_shortcode('em_wp_query','my_em_wp_query');

note: this snippet might not work out of the box but it might give you a good start

If been that far, but don’t know what to put into the array. Just starting to learn PHP. So I don’t know what

'groupby_orderby' => 'event_start_date,event_start_time'

would be in WordPress Query…

This is not working (obviously):

<?php
	$args = array(
		'post_type' => 'event',
		'meta_query' => array('key'=>'recurrence_id', 'groupby_orderby'=>'event_start_date,event_start_time'),
	);
	$query = new WP_Query($args);
?>

	<div class="archive-events-overview">
		<div class="row">

			<?php if ( $query->have_posts() ) : ?>

				<?php
				/* Start the Loop */
				while ( $query->have_posts() ) :
					$query->the_post('');

					/*
					* Include the Post-Type-specific template for the content.
					* If you want to override this in a child theme, then include a file
					* called content-___.php (where ___ is the Post Type name) and that will be used instead.
					*/
					get_template_part( 'template-parts/content-archive', get_post_type() );
					
				endwhile;

				the_posts_navigation();

			else :

				get_template_part( 'template-parts/content', 'none' );

			endif;
			?>
		</div>
	</div>