Green hydrogen is considered the cornerstone of sustainable energy and has received attention from the world because it is capable of removing carbon. However, it remains a challenge to achieve economic sustainability in the downstream green hydrogen supply chain. This study aims to explore economic sustainability factors in the downstream supply chain. Using Scopus and Web of Science databases, articles were pooled, selected and peer-reviewed to ensure inclusion of studies with impact and relevance. This methodological understanding is based on literature review (LR) integrated with bibliometric analysis to provide a comprehensive perspective. The bibliometric analysis was based on identifying influential studies, research trends, and key areas, while the content analysis was based on an in-depth exploration of the factors that drive sustainability. The analysis highlights critical factors such relevance of green hydrogen research with other research areas, sustainability performance enablers for green hydrogen supply chain related research connections and other areas that need improvement. The results indicate economic sustainability because it is affected by economic and technical trade-offs and investments in logistics and distribution networks.  Moreover, digital technologies and artificial intelligence have become prominent in improving supply chain performance. The study also underscores the importance of policies that influence green hydrogen adoption and reduce barriers to private sector investment.  This hybrid review not only fills knowledge gaps, but also provides insights that can be applied by researchers and policy makers. This research is conducted to understand the research gap in developing sustainable transportation for green hydrogen downstream supply chain and what are the sustainability performance enablers with scope focused within the sultanate of Oman. Future research will focus on developing quantitative frameworks and models to operationalize enabling factors across market contexts and geographic regions.