<p>The integration of FANETs, IoT, IoV within 6G enabled smart cities represents a transformative direction for next-generation urban infrastructure. However, the heterogeneity, mobility, and resource constraints of these networks introduce significant challenges in achieving reliable, scalable, and low-latency communication. This study aims to analyze and synthesize the existing literature on FANET–IoT–IoV integration to identify research gaps, performance limitations, and future opportunities within the 6G communication landscape. Using a systematic literature review methodology, recent surveys and research work are evaluated in terms of architectural frameworks, communication protocols, performance metrics, and integration challenges. The review highlights that while existing studies provide valuable insight into individual technologies, there is limited literature on frameworks for cross-domain interaction and 6G-enabled optimization. Key research gaps are identified in areas such as energy efficiency, interoperability, mobility management, and cross-layer security. The implications of this study extend to designing adaptive, AI driven, and sustainable communication infrastructures to meet the requirements of future smart cities.</p>