E190 near collision Mildura May 16 - ASI bulletin 56

[Utradar]

From the report:

'The flight crew looked out the right window of the flight deck and identified the traffic to their right and high against the skyline. The traffic appeared to them to be stationary in the windscreen relative to their own aircraft and with a high closure rate (from TCAS data the aircraft were 1.25 NM apart at the time of the TA alert)'

So the report does mention a visual confirmation.