not the same; that scan QR is for the barcode AFTER injection; the booth will have the barcode and the nurse will direct you to scan it and she will check; it contains the vaccine number, batch number, expiry date, etc

not the same
the one asking to scan in the vaccination page, the nurse will only ask u to scan it after you're vaccinated

not at entrance
but it's not a compulsory scan though...my parents case is 1st dose, i was waiting for them to ask but never did
2nd dose, they ask to scan but fail....they still update it manually and u still get the digital cert