lol I'm from Germany and most people I know use for many years already :D
(Telegram: even just having it installed would be seen as a political statement, it's where the weirdos congregate to antivaxx and flatearth and reinstate monarchy or whatever they do)
On top of that, nearly all groups related to kindergarten, school, or various clubs use WhatsApp, and there’s practically no way to convince them to switch. If my wife weren’t in those groups, I’d have no idea what’s going on.