This report synthesises findings from 4 peer-reviewed papers addressing the following research question: How effectively do prototype-based embeddings in federated GNNs transfer across domains, measured by cross-domain accuracy when applying models trained on financial graphs to healthcare networks. Deep learning (DL) has become a core component of modern artificial intelligence (AI), driving significant advancements across diverse fields by facilitating the analysis of complex systems, from protein folding in biology to molecular discovery in chemistry and particle. 7 claims were extracted from source literature; 7 were independently verified against retrieved documents. An automated multi-reviewer quality assessment produced a score of 7.9/10. This report is a machine-generated literature synthesis and does not constitute original research.Research goal: How effectively do prototype-based embeddings in federated GNNs transfer across domains, measured by cross-domain accuracy when applying models trained on financial graphs to healthcare networks?Autonomous literature synthesis. Automated review score: 7.9/10. Full text and citation available at Assignee Research.