As this is about to happen, I thought I'd start with the official EU website for the system.
Travel in Europe with the European Entry/Exit System (EES)
Starting in October 2025, the Entry Exit System (EES) is a biometric border check for travelers to the 29-country Schengen Area that will ease travel for non-Europeans to European countries.
Obviously search engines return a slew of stuff based on speculation.
Once in operation, if those with experience could feedback that would be great.