I meant you might be supported by the ailexpress dealer you bought from not from Segway-Ninebot. In my experience, it's not global warranty. You will only be serviced by where you buy the product from.
Yes, everyone can put CE mark on the product but they need to have supporting test reports from the 3rd party testing labs. Also the EU contact detail has to be mentioned next to the CE mark. None of the CE tests have been done so far. Since you don't care, it doesn't matter to you.