Facebook Graph API pull a Posts basic data like Instagram Basic API

Question

We are developing a mobile app that if share a FB post link to it, like you can share on WhatsApp, we want to be able to read the title or summary or start of that FB post, and redirect our App to the corresponding area.

So it works on Instagram using: https://developers.facebook.com/docs/instagram-basic-display-api/ Where give the post ID and it pulls in the caption text etc. So works for IG and some other socials for anonymous users.

But for FB links, it mostly shows us the login page, in most cases (sometimes it worked on localhost maybe if logged-in - but could not recreate on server environments).
So cannot pull in any info about the post have shared using a direct FB share URL or maybe via some method on FB Graph Api, we could not see an easy way.

Does anyone know a generic method that anyone sharing a post to an app, or even just being able to see the title or summary of a FB post using the default share link, so we can direct our App to the right page.

So essentially using a FB post share link, we want to be able to read some basic data of that Post, whether logged in or not, and happy to do this via Graph API or FB App or any other ways.

Again in summary - need to Get some user defined parameters or text or ideally hashtags from the post just using the share link of any FB Post/Page.

Any ideas or help appreciated.