My client could not get subdomains of his website and he bought a completely different domain but the content and design, everything is the same so those two sites are duplicate site for different locations. Can I set hreflangs for two different domains like this
<link rel="alternate" hreflang="en-US" href="https://example.com/"/>
<link rel="alternate" hreflang="es-AR" href="https://ar.differentexample.com/"/>