Yes

Yes, the device can be used by multiple users. It offers two user profiles, each with 100 memory locations, as well as a guest mode.

Yes, the Omron Connect app, which is compatible with the M7 Intelli IT AFib blood pressure monitor, can transfer the measurement data to the Apple Health app. The app supports synchronisation of blood pressure and heart rate data with other health apps, including the Apple Health app, via Bluetooth.

Unfortunately, this is not possible.