It depends on which style you are using to populate the grid. If you are using Grid Style 1 (default), you can change the file includes/blocks/modules/module-11.php file and insert the post meta information there like this –
<div class="lsow-module-entry-text">
<?php echo $this->get_title(); ?>
<div class="lsow-module-meta">
<?php echo $this->get_author(); ?>
<?php echo $this->get_date(); ?>
<?php echo $this->get_taxonomies_info(); ?>
</div>
<div class="lsow-excerpt">
<?php echo $this->get_excerpt(); ?>
</div>
<div class="lsow-event-data">
<?php echo get_post_meta($this->post_ID, 'event_date', true); ?>
<?php echo get_post_meta($this->post_ID, 'event_time', true); ?>
<?php echo get_post_meta($this->post_ID, 'event_location', true); ?>
</div>
<?php echo $this->get_read_more_link(); ?>
</div>
Pls replace with corresponding post meta key for events like these – https://theeventscalendar.com/knowledgebase/wordpress-post-meta-data/.