Wow a faraday cage is needed then… :(

It’s 1984 for sure. Every devices listens.

Yep an isolated vlan with no internet access. Cast your media from a dongel or computer connected via hdmi.

Replying from my pixel 4a with grapheneOS. Phone just works, friendly pocketsize and with proper fingerprint reader.

After several years I have landed on Debian with plain old gnome for my whole family. Boring as f***, but it just works. Currently untraining myself from opening my terminal on fresh boot to do pacman -Syu. Flatpacks have solved my need for updated software.