How to get Firebase Dynamic Link URL social metadata itself

Say I have original URL: https://flutree.web.app/NWfLo\ And I shorten it using Firebase Dynamic Link, and set with Social Metadata (image, title, desc), it becomes new URL : https://flut.page.link/hcpa

Now I want to have a Link Preview functionality, I'm using simple_url_preview package. Basically, the package did a GET request of the new URL and parse the og(s) property from the body.

The problem is, it returns the metadata of the original URL, as depicted below:

Behavior that I want to achieve is as below (Example from Telegram's Link Preview, same behavior observed on other major platform ie Twitter, WhatsApp etc):

So, how can I get the metadata of the Firebase Dynamic link itself and not the original/target URL?