Quantum network and quantum repeater are promising ways to scale up a quantum information system to enable various applications with unprecedented performance. As a current bottleneck of building a long-distance quantum network, the distribution rate of heralded entanglement between remote network nodes is typically much lower than the decoherence rate of each local node, which obstructs the implementation of a metropolitan-scale quantum network with more than two remote nodes. A promising scheme to accelerate the remote entanglement distribution is through multiplexing enhancement based on a multimode quantum network node. In this work, we experimentally realize a functional (5)-ion quantum network node with two different types of qubits inside. We employ a hybrid multiplexing scheme combining the methods of multiple excitation and ion shuttling, in which maximally (44) time-bin modes are generated and sent through a long fiber to boost the entangling rate. Via this scheme, we can generate heralded ion-photon entanglement with a high fidelity of (96.8%)/(94.6%)/(89.8%) with a success rate of (263\,\text{s}^{-1})/(40\,\text{s}^{-1})/(4.28\,\text{s}^{-1}), over a fiber of (3\,)m/(1\,)km/(12\,)km, respectively. In addition, the memory qubit can protect the stored quantum information from the destructive ion-photon entangling attempts via dual-type encoding and a memory coherence time of (366\,)ms is achieved. This coherence time has exceeded the expected entanglement generation time (234\,)ms over a (12\,)km fiber, which is realized for the first time in a metropolitan-scale quantum network node.