A parallel workshop “2D-PL advanced characterization methods” https://graphene-flagship.eu/events/2d-pl-advanced-characterisation-methods-workshop/ was also organized under the auspices of Graphene Flagship. The workshop was also provided online with an audience of ~ 300 registered participants. 2D ENGINE member LPM contributed with a talk on the liquid metal catalyst growth of graphene and the in-situ, real time monitoring with radiation probe microscopy.