If I purchase macbook and iphone from dubai and use both in Pakistan. Is there any way to use FaceTime in both devices?

However, with iOS 11.3 and later, FaceTime is available on iPhone, iPad, and iPod touch in Saudi Arabia. And with iOS 12.4 or later, FaceTime is available on iPhone, iPad, and iPod touch in Pakistan. Update your device to get FaceTime in Saudi Arabia and Pakistan.

Great question Rizwan,

This article posted by Apple Support should answer your question Find or restore a missing FaceTime app - Apple Support

Thanks.

Axel F.