Yes, it is possible to integrate multiple blockchains into a DeFi app. However, the complexity and cost of development will increase accordingly. Integrating multiple blockchains into a DeFi app can provide various benefits, such as increased scalability, interoperability, and access to a wider range of assets and liquidity. However, it requires careful planning and implementation. Each blockchain has its own unique features, consensus mechanisms, and smart contract languages. Integrating multiple blockchains requires developing custom bridges or utilizing existing interoperability solutions to enable seamless communication and transfer of assets between different chains. The development team needs to have a deep understanding of the underlying technology and protocols of each blockchain to ensure smooth integration. They also need to consider the potential impact on the app's performance, security, and user experience. Additionally, integrating multiple blockchains may require additional development resources and expertise, which can increase the overall cost and development timeline of the app. It is essential to carefully evaluate the benefits and trade-offs before deciding to integrate multiple blockchains into a DeFi app.