can we activate FaceTime on set bought from uae in other countries

My first reply was No. Any device bought in UAE has facetime disable no magic will get it enabled.

And if you ask again the answer is still no.

And if you didn't click on the link I provided and read the first paragraph like I ask here it is for you

You might have issues using FaceTime for one of these reasons:

• FaceTime and FaceTime audio calling might not be available for all countries, regions, or carriers. 
• FaceTime isn't available or might not appear on devices purchased in Saudi Arabia, Pakistan, and United Arab Emirates, including Dubai. However, with iOS 11.3 or 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. 

No. Read here first paragraph If you can't make a FaceTime call on your iPhone, iPad, or iPod touch - Apple Support

Hi! I bought my iPhone in UAE and for the longest time it doesn’t have FaceTime. Just the other day though I updated my software to iOS 13.6 and when my phone rebooted, voila I saw FaceTime. I was so excited that I immediately tried FaceTiming a friend, and it did work! Maybe you can give it a try too 😊

and looking at your previous comment, I did reset the phone settings and set it for United States and it has been with a US sim for ~7 months now