Why Yoast display canonical url metadata in facebook?

Could you please explain the issue more clearly? When you share a link on Facebook, does it display the incorrect canonical? If you could provide a screenshot, we could check this further. Did you already try scraping it through the Facebook Sharing Debugger Tool?

Hi Michael, sure.

I have a page X1 and canonical url points to X2 now when i share the first (X1) url, it shows second’s (X2) url metadata and info in facebook even if u scrape it again.

Can you try yourself. Create a page, then add some random url into canonical and then scrape the first url in fb debugger, does it get the canonical url or the first one u originally scraped?

Could you please show us some example URLs where the issue remains occurring for you so that we can take a look at them?

1. I have https://www.mydomain.com that has the canonical field filled with https://www.google.com.
2. When I paste https://www.mydomain.com into facebook, it fetches https://www.google.com metadata and links to there.

In conclusion, when I share my website on facebook, it displays canonical website information and links there, not to my original link that was shared.

This is to be expected as when a canonical is set to a different URL, this means search engines and Facebook will fetch information from the canonical URL rather than from the page URL.