Sorry, soft buttons. One on the lock screen and one in the home screen.

And yes, as far as I remember Xperia was good, it just failed physically (later realized it was my fault as I used it as alarm clock and ended up applying force to the charging cable each morning.) Also they lost me as a customer when they included Amazon ads in a OS upgrade.

You can set it up in the Control Center. That's how I access my camera.