If this guy uses standard ISP-provided DNS resolvers, authorities could just pull the DNS logs and find the DNS queries matching Discord domains. I'm sure no mom of an adult child really uses Discord.
GNUmer
Fedora. There's a video of him explaining why he uses Fedora instead of Debian.
Edit: Link to Fedora's pages and a Youtube video on why Linus does not use Debian (or debian-based distros)
https://fedoraproject.org/wiki/Is_Fedora_For_Me#Other_People_Using_Fedora
There is no direct way to forward calls with KDE Connect or any other app, but there might be a solution if you would mainly receive calls at home.
If you're willing to learn and configure, you could setup a PBX server with a Pi or an old machine by installing Asterisk and setting up your phone as a trunk line for it via Bluetooth (I'll find the instructions soon)
The idea of a "distro for EU public sector" is neat, but even the PoC has some flaws when considering technical sovereignty.
First of all, using Gitlab & Gitlab CI. Gitlab is an American company with most of its developers based in the US. Sure, you could host it by yourself but why would you do it considering Forgejo is lighter and mostly developed by developers based in the EU area?
The idea of basing it on Fedora is also somewhat confusing. Sure, it's a good distro for derivatives, but it's mostly developed by IBM developers. The tech sovereignty argument doesn't hold well against Murphy's law.
Car accident foreplay is wild.