Easy to say, harder to execute. Network effects keep American companies as the main way people communicate, whether it's WhatsApp, Instagram, Facebook (or Facebook Messenger), or something else.
Russia and China have nation-wide firewalls. I know that at minimum, China blocks most or all of Western social media sites. I don't want to live in a bloc of countries that blocks parts of the web "for my protection".
Seems strange. EU is capable in everything but silly chat apps and more complex, search engines?