In Helsinki the scan , fingerprinting, and photo are done by a passport officer at the usual booths. My experience was one of the most thorough run through of my plans that I have had in a long time! Even so, just 15 minutes. There is also a special channel called “short connections “ that is available for those in need.
Part of that concern/thorough run through was caused by the very “relaxed” Italian border agent who glanced at my passport, never scanned anything and sent me on my way when leaving Rome in May.
The Finnish border agent told me they recorded my entrance in Italy, but never my departure! Fortunately I keep all of my travel data on my trip-it app. I was able to pull up date, flight number, etc with ease. He then adjusted records to show what had happened in Italy.
Travel is always an adventure….,