Apple watch purchased from UAE

There are 2 Apple Watch cellular radios

• Canada, U.S. Mexico, Puerto Rico

• The rest of the world

Carriers will not attempt to connect to an Apple Watch that does not use the correct radio.

If you do not get your Apple Watch in your own country, you may have to return the Apple Watch to the country where purchased to get warranty service.

If you do not get your Apple Watch in your own country, there may be country specific restrictions in the installed Apple Watch software that prevent features from working when you get home.

https://www.apple.com/watchos/feature-availability

The GPS only model should be no problem.

M1 Mac mini, macOS 11.2.3; Watch, series 5 GPS/cellular, watchOS 7.3.2; iPad Pro 2nd Gen, iPadOS 14.4.1; iPad Air 2, iPadOS 14.4.1; iPhone 12 Pro, iOS 14.4.1; TV 4th Gen, tvOS 14.;  HomePods, audioOS 14.4.1 and Airport Express w/ Airplay 2