> The chips have biometric info (hence the name) like legal name, sex, nationality, photos, and sometimes fingerprints

... legal names and nationalities aren't "biometric info" though. Is it fair to say that the chip contains the content of the travel document at the time it was issued (doesn't the chip also include the passport number, issue/expiration dates, etc) but not the stamps/visas that are added after the passport is issued ? I think everyone gets that the chip isn't updated when you get stamped into or out of a country.