Get get_the_ID() on single post

Hello, I have a plugin that displays certain information based on certain post IDs. I got the plugin shortcode to display it on the “single page” template. My problem is get_the_ID() / or global $post which is used to retrieve this information, gave me the model ID. How can I access this information please: unique item id
Greetings

Hi,
I needed for my plugin, and using an additional module on template will probably delay execution.
For thoses who need this is what I used :
url_to_postid($_SERVER[‘REQUEST_URI’]) <= single post
get_page_by_path($_SERVER[‘REQUEST_URI’]) <= page
Thank you.