I think it is because 90% of company sustainability is simply greenwashing.
Fairphone also had the whole "fairbuds" thing where they released tws earbuds (and then removed the headphone jack) and supported them for under 2 years before throwing them away and they are completely non-repairable, then acted like they didn't exist.
The new fairbuds are 10x better though, but I have heard the sound on both of their headphones is mediocre at best.
Clickbait title in the OP, but they mean the methods coming out for tracking people without any electronic device on them at all via heavy filtering and pattern recognition to make 3D space snapshots due to the distortion in the WiFi transmission reflections.
What you are talking about are all surveillance devices based on compromising a specific device and using it to surveil an electronic device. The closest one of those device comes is the TAWDRYYARD which just communicates a position with light.
Though there is 0 doubt that this tech has been discovered and used by the NSA/mossad and other government intelligences already.