It is only a slight exaggeration to say that Ukrainians can now track the movement of Russia's armed forces just by geolocating the bluetooth earbuds that Russian soldiers stole in Ukraine.
Now this is public we can cross check to see how sophisticated Russian OPSEC is.
If they are any good then Russian NCOs will start shouting at their conscripts and we will see these devices being rapidly switched off.
That window on Russian movement will then get switched off.
If that's the case then people doing Ukrainian OSINT might have preferred it if this technical detail hadn't been spread all over social media...