I. Introduction  
II. Methodology for Systematic Literature Review  
III. Significant Discoveries from the Comprehensive Search  
A. Assessing the Implications of UAM Integration  
B. Conceptual Framework for Evaluating Simulators in UAM Integration  
C. Variations in the Capabilities of Current Simulators  
D. Air Traffic’s Interaction with Ground Traffic  
IV. Key Research Gaps and Future Directions  
A. Comprehensive Regional-Scale Simulation  
B. Holistic Impact Evaluation  
C. Collaborative Research and Development  
V. Challenges and Conclusions