I would agree with the magnet vs chip argument, thus the magnet changes your brain. It is a new input…for you brain.
Sure-sure you can interpret the memory of the chip as an input device, but you need another device to access the data on it.
I’d argue pacemaker makes you a cyborg, borderline, I’d say.
Fake tooth, glasses, watches, dildos, smartphone are just devices. If you accept them as technology you might as well call beavers cyborgs, or otters those banging stones on their bellies.
Magnet maybe, eyeborgs maybe, neurolink maybe soon. Although you could argue with me that these augmentations worth not a lot without technology and that includes magnets as well. What would you feel otherwise? Magnetite?
Or if you accept prosthetics as augmentations you might as well consider medicines, they keep people alive longer, make stronger…etc
Does a passport make you the part of the nation or the way you feel about it & the cultural heritage you share with others. Or is it your DNA. How many of these can you miss from this mini list yet still have real nationality?
I think you considering yourself as cyborg makes you cyborg. That generally speaking changes the way you think about your surrounding and interact with it. It changes you and the world around you in some way.