ICLOUD Texting Regarding My Stolen iPhone has been temporary online

My phone has been stolen yesterday, and I activated lost iphone and erase this iphone on findmyiphone. I have transferred my sim card into a new sim card and inserted it into my Iphone5 and disabled the one on my stolen iPhone11. The next day (today), I received a text from iCloud (refer to the picture), and my desperate self clicked the linked recklessly.

The website (I won't be able to provide any images on this part except the text) asked for my iCloud pass and the Pin code on my Iphone11, after I input those data it transferred me into a findmyiphone page but my Iphone11 and an Airpod connected to my account has disappeared and only the Iphone5 can be located. I need to know if this is the legit "iCloud" contact, because when apple asks for an authentication code, the contact name is "Apple". So does the two differ?

To add, there is also a phone number that called me (missed call) the same time the text arrived, I may have overlooked this, thinking someone tried to call my number to tell me that they found my phone, but I remembered that I inserted another contact number on the "Lost iPhone" message.

Thank you.