Digital procurement systems have become essential to improving transparency, efficiency, and decision-making in construction. While research in this area is growing, it remains concentrated in technologically advanced regions and often siloed around specific tools or platforms. This has led to a limited synthesis of global trends and an underrepresentation of implementation insights relevant to developing economies. This study aims to map the evolution of scholarly discourse on digital procurement systems in the construction industry, identify thematic trends, and highlight research gaps, particularly within developing contexts. A bibliometric review was conducted using the Scopus database. VOS viewer software was used to analyse 61 relevant publications from 2020 to 2025. The study applied performance analysis and science mapping to examine research output, global distribution, co-authorship patterns, and keyword clusters. The findings reveal five dominant thematic clusters: lifecycle innovation, digital intelligence, lean governance, smart procurement, and digital infrastructure. The United Kingdom, Australia, and Hong Kong emerged as the most dominant paper contributors. Blockchain, AI, and BIM were the most frequent co-occurring concepts. Notably, developing countries remain underrepresented. The study highlights a growing body of research on digital procurement but reveals significant knowledge gaps in implementation, especially in the Global South. It calls for more inclusive, localised, and policy-aligned research to support Construction 5.0 adoption in emerging economies.