Disappointed with AppleCare

AppleCare+ was never advertised being a worldwide coverage plan. If you read the details it in the warranty it says that care may be limited to country of purchase only. Some things like a battery replacement can be done anywhere (at the discretion of Apple) but other things like hardware in the devices may require specific hardware that was only made for that country. Especially if the device is being replaced, then it needs to come from the same country where it was purchased. The only place that I know is an exception is EU where you can get warranty replacement or repair anywhere in the EU if it was purchased in the EU. Don't be upset by not understanding AppleCare+ when you purchased it if you didn't read the fine print.

AppleCare+ is basically an insurance, and is handled for each country or region. You would need to make your claim in the region where you purchased AppleCare. There are also regional hardware differences and the parts for your Watch may not be available in some other regions.

anypats wrote:

The only place that I know is an exception is EU where you can get warranty replacement or repair anywhere in the EU if it was purchased in the EU.

That is because Apple has one subsidiary based in Ireland, covering the whole of the EU region as a single area.