I'll describe my problem.
I have site A1, and the URL 1:
I also have another site A2, and the URL 2:
https://example2.com/link. This webpage has a canonical URL point to the URL 1:
https://example1.com/link by using link tag:
// source code "https://example2.com/link" <link rel="canonical" href="https://example1.com/link" />
Now, suppose the URL 2 is shared many times as backlinks. So which URL will benefit in SEO?