Is apple.itrackdevice.info a legitimate Apple URL?

Scam. Apple does not send messages where you lost iPhone is. That information is available only in the Find My app. Those messages are known scams and will ask for your Apple ID and Password, so they can unlock your device and steal your data as well as give them the ability to remove the Activation Lock on the device.

Hello~ I will be willing to bet it’s a phishing scheme. Careful…

Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support

~Katana-San~

Make sure that SIM is cancelled and put a PIN on the next one, It's probably how they found you

For future reference, ALL legitimate Apple sites will end with apple.com or icloud.com. Unless “apple” or “icloud" is the last thing in the URL before the end or a slash (/) it is not an Apple site.