Is Mintlayer layer 2?

I'm curious to know if Mintlayer can be considered a layer 2 solution. From what I've read, layer 2 solutions are designed to enhance the scalability and throughput of blockchain networks while maintaining the security and decentralization of the underlying blockchain. Does Mintlayer fulfill these criteria, or is it more of a standalone blockchain with its own unique features and use cases? I'd appreciate it if you could clarify this for me.