I have currently 8 IOS devices "Protected" on my Bitdefender Premium Subscription.
One of those devices doesn't even have Bitdefender installed since I erased it, removed it from my Apple ID, and gave it to a relative and she put it on her Apple ID. On my Bigdefender list of devices, I renamed the device and created a profile for her which appears OK on my Bitdefender list of protected devices.
She has a foreign (non-US) phone number which I put on her profile that I created and which appears on the device list for my Bitdefender Account.
If I install Bitdefender again on her device (which would still be shown in my list of 8 devices) will the Bitdefender still function and protect that device regardless of where the device is located in the world?