expat'23 is the 6th face to face event of the Experiment@ International Conference series, a biennial event dedicated to online experimentation (OE), with its relevance reinforced by Industry 4.0/5.0, and contributing to extend the world capabilities in this particular area and to develop collaborative work in immersive technologies, bringing together engineers, researchers and professionals from different areas. OE comprises remote and virtual experimentation as identifiable and accessible objects and their virtual representations in the Internet of Things structure. expat'23 provides a three-day forum of discussion and collaboration between academics, researchers and industry and medicine professionals, trying to bridge the gap between academic applications and the real world needs and experiences. It offers to the participants an opportunity to present their recent work and to take part in technical sessions, workshops, exhibition sessions, round tables and panel discussions.