Um how exactly do you think these “rogue devices” would exfiltrate that data? Do you think iOS is providing Internet access to the faceID module or the display? Or do you think these devices somehow contain an entire wifi chipset to connect to the Internet to exfiltrate your data without anyone noticing an entire extra SoC soldered onto the part?
Please provide any argument as to why you think these could exfiltrate data over these interfaces? Unless you think iOS’s security is so poor that it lets any hardware device that’s attached to it get full network access? (Which I’m pretty sure is not physically even possible in most cases since those connectors are only capable of sending the type of data across for that particular sensor.)