Yes, I understand that this would only be for Redirection. I can handle finding any other possible redirects, such as with the _wp_old_slug for posts.
My use case is this:
I’m dynamically adding some link rel="alternate" tags that contain the URL to the current page in different languages (multisite). If you’re on the US /contact page, it will show /kontakt for Germany. We use Redirection already on the German site to redirect from /contact to /kontakt. So, if there’s a way to run some function like get_url_after_redirects('/contact') then I would be able to get the final URL that it would reach after Redirection.
