> It's a missed opportunity for the digital soverignty the EU says it so badly needs. The code for a government backed WhatsApp competitor is there, in multiple instances even. Launch a WhatsApp clone and put all governement communication through it so everyone has to have it installed, and you have an instant EU-wide userbase. From there, people will naturally start to use it between themselves.
I think you have completely misjudged how much the majority of people would not want to use an EU-controlled chat app.