Irrespective of how bitcoin is moved around the chain, there are devices that could be used to trace transactions and i believe these are the device the government agencies uses to track bitcoin movement so as to apprehend wallets owners.
I don't understand what you are talking about. What devices? Can you elaborate on that a bit?
There are blockchain explorers and experts who who have knowledge and expertise in tracing transactions and identify patterns or connections on the blockchain, but I have never heard or read that there are any specific physical "devices" that could be used to trace transactions. Maybe you just used the wrong word?