If you created your cpt correctly and just want it do be displayed like any other post, there is nothing else you need to do. WordPress will use the single.php from the theme and display the single versions of your post type as a normal post.
If you want to add additional meta, you could do this with a function and a filter. for instance to add your meta after content you this:
function rt_before_after($content) {
if(is_singular('your_post_type')) {
$beforecontent="", //what you want before ie meta
$aftercontent="", //what you want after ie custom meta
$fullcontent = $beforecontent . $content . $aftercontent;
return $fullcontent;
} else {
return $content;
}
}
add_filter('the_content', 'rt_before_after');
If you are trying to customize the display of your CPT it’s going to be a bit more difficult.
Every theme is going to use their own hooks… if they use them at all. You’re playing a guessing game as to what they may or may not be doing for each theme. Seems easier to make sure they they use your data with a template. Here’s what I use: (you’d need to alter the code to fit your CPT name and template location)
function rt_load_custom_template( $template ) {
if ( is_singular( 'your_post_type' ) ) {
$template = plugins_url( 'templates/your_post_type.php', __FILE__ );
}
add_filter( 'single_template', 'rt_load_custom_template', 50, 1 );
return $template;
}