I used to work as apple technical support. Not for dealer like machine or whatsoever it is.
Malaysia is unlike sg and au where they this consumer Law and apple care which we dont have here.
It is not advisable to buy from another country and claim warranty in another country if the iphone got some issue due to the restriction of some hardware component and software based on the region you've purchased. However there is always what we called 1 time exception which only can be provided by Product specialist.

I wont talk much about 1 time exception as most of the time it only can be given under special circumstances.

As an for applecare it is strictly only can be claim on the country where you purchased the iphone as they need the valid address for the country that got applecare.

Your statement on the iphone worldwide warranty is totally misleading. My advice is for the potential buyer please contact apple support instead before you buy and ask them information regards the warranty claim for iphone.

We cant just rely on screenshot which might be edited or agreed with other user as the user might be fake account.

Be wise. Chilllllll