This is a Significant Operational milestone.
The first flight was conducted by the first prototype, PT1 (F-WWOG). This was followed by PT2 (F-WWPL) on Jan. 27, 2016 and PT3 (F-WWPA) on Oct. 13, 2017.
Source: "H160 Comes Together", Mike Hirschberg, VERTIFLITE September/October 2018, Page 32