Except EU is not a single market: there's 27 countries, speaking multiple languages, having different laws, so to serve the EU you need at least a dozen versions of your app.
Also, EU has just decided that this half billion of consumers will be downgraded to the third world standard of living (google "Fit for 55"), so they won't really have much money to spend on tech toys anyway...
The only way to reduce greenhouse gas emissions by 55% is to push everyone into poverty, basically. Make the car ownership too expensive for common folks, as well as meat consumption, buying new clothes, heating your apartment in winter, air travel, and more.
Why wouldn’t massive buildout of nuclear energy plants allow hitting that greenhouse emission goal while simultaneously tripling the amount of power used per person?