Actually in Australia, IDs usually do get scanned and stored. About the same time I was getting too old for clubs, they were starting to introduce ID scanners. You line up, hand over your driver's licence or passport, they slap it on a wall-mounted scanner, the scan goes into a database and in you go. No scan, no entry. Nowadays I think they just use phone/tablet scanners.
Yes, handheld is now used. If you use the digital licences app on your phone in NSW/QLD the licence details are picked up by a QR code and cross verified via an auth API with Services NSW / TMR QLD. You are also checked against a database of banned patrons, against court ordered exclusions, and police issued exclusions. If you use the physical licence, an extra step of ID —> licence details extracted occurs, then the same process is followed.
I agree that people will lose their identity online if age checks become normalised. That’s not been the case with the club and inner city alcohol venues checks.
In Finland the government has allowed banks to offer (2fa) identification services to those that are using their services. If I sign into a government site using my banking ID, the bank gets paid for providing the service. To my understanding none of my actual ID information is transferred to a party wanting to identify me.
The Linkedin 'validate your identity' was the first time i was asked to actually take a picture of my passport/scan the chip. I'll refuse until they'll allow me to identify with my banking ID.