Iphone stolen - link sent that open Find my Phone app

Yes, the link is fake. There is no URL to go to any findmyiphone site. There are two ways, and only two ways, to track your device. One is via the find my iphone iOS app on another iOS device. The other is to sign in to your icloud account (https://www.icloud.com/) and track it from the app there. That’s it - those are the only two ways to track a device. Any other URL, link, note etc is a fake, plain and simple.

If you have two factor authentication enabled, you will need an authentication code to sign in to icloud in a web browser (at least for the first time login for any web browser).

Note too that the URL you post uses the .ID domain suffix, which indicates a country domain for Indonesia. Apple already owns its own company *.com domain(s), so why would they use Indonesia as a hosting domain for antyhing? Apple’s own country specific web pages always (ALWAYS) use the .apple.com/ URL domain extension, and then indicate the country code after the slash.

And Apple will never contact you about a lost or stolen device. They don’t track devices for anyone. They don’t have any way of even knowing if your device is lost or stolen.

That's a scam, sorry. You shouldn't have answered to that e-mail. Apple never track any lost or stolen iPhone.

See also this article:

Avoid phishing emails, fake 'virus' alerts, phony support calls, and other scams - Apple Support

Regards

Giulio