I guess it won't happen, at least not for now. Bitcoins being treated as commodity by majority of asian countries. Even some countries restricted Bitcoin to be used for the daily transaction.
In this case, It sounds impossible for that ecommerce to accept Bitcoin as a payment method. It's following regulators, which saw Bitcoin not as a legal tender.
Like Europe and Africa, not all Asian countries consider bitcoin a commodity and do not use it as an alternative payment method. There are countries that almost completely ban bitcoin, but there are also countries that allow businesses and individuals to use bitcoin as a payment method.
Such as South Korea, Thailand, Japan, Philippines, Hong Kong and finally Singapore. While they do not recognize bitcoin as legal tender like El Salvador, they still allow people to use bitcoin as a method of payment in commerce. But not all businesses in those countries have adopted bitcoin, and that's a business decision, not a legal barrier.