Although interest in the intersection of sustainability and digital transformation is growing, Sustainable Digital Transformation (SDT) remains under-defined and empirically thin. A comprehensive review of the SDT literature was done in this study to assess the extent of empirical research. Searches of Scopus and Web of Science were refined for relevance and complemented by bibliometric mapping and SDG alignment. Findings indicate a post-2018 publication surge, with six thematic clusters, and SDG attention concentrated on SDG 9 and SDG 13 (with links to SDG 11). Use of “sustainable” is often rhetorical, with few designs tracing outcomes to specific SDG targets. Results show that SDT research remains fragmented, and that clearer concepts, SDG-linked indicators, and designs demonstrating measurable SDG outcomes are needed to inform policy and practice.