In order to fulfill the basic functions of our service, the user hereby agrees to allow Xiaomi to collect, process and use personal information which shall include but not be limited to written threads, pictures, comments, replies in the Mi Community, and relevant data types listed in Xiaomi's Private Policy. By selecting "Agree", you agree to Xiaomi's Private Policy and Content Policy .
Ok, go to your mi account on a desktop, and sign in. Then click on find my phone. If you registeted it/granted the permissions, it will give you its location.
If not, go to your google account, still on desktop, and do the same.
I hope it helps and you can be reunited with your phone again.