Can i add a security chip to Librem 5 (like Google pixel has Titan M)?
I suppose that the audience of Librem 5 would explicitly prefer to not have such chip in Librem 5.
Such chips could be a trade-off of more security against less anonymity.
The Librem 5 approach would be to use the integrated Smart Card reader with Pure Boot to achieve similar results without the negative sides of a built in chip.
You can exchange the smart card in the smart card reader, but you can’t viably remove/exchange the chip so the chip would be an identifier of the device.
Check these 2 videos for Pure Boot and the Smart Card reader: