My name is ***** ***** certified professional with over 10 years experience. I will be glad to assist you with this.
I am sorry to hear that happened.
Unfortunately all you can do is hope that someone fond the iPhone and switches it on. Continue checking the findmyiphone, it will show the last known location. You can also send a message to the phone screen so that it appears when the phone is powered on. Include your phone number in the message in case it is found. The phone can't be used by anyone else. There is no way to bypass the icloud lock.
Please let me know if you need any other assistance.
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Thank you very much!