Aha, ok then what you’re wanting needs some code in a custom template.
So to have posts and events suggestion similar posts and events, add this to you theme’s template file:
yarpp_related(
array(
'post_type' => ['post', 'event']
)
);
Although I’m not sure which event plugin you’re using, so you’ll need to find the custom post type’s exact name, which might be “espresso_events” for Event Espresso, or something else for any of the other plugins. You might need to ask the developer of the event plugin you’re using.
You’ll probably want to make that change to your theme’s single.php
to change it for posts, but for events it again depends on the plugin. This article explains customizing theme template files, but you should probably ask the event plugin’s author which file to customize to change the look of events.
Also, on the YARPP settings page UNcheck where it says to automatically display related posts on posts and pages.
Does that make sense? I’m sorry it is a bit technical, which might be more than what you bargained for.