Is Monero a Layer 1?

Could you please clarify for me whether Monero is classified as a Layer 1 blockchain? I've been hearing different opinions about this, and I'm trying to get a clear understanding. Layer 1 blockchains are typically associated with mainnets that have their own independent security and functionality, without relying on any other blockchain. Given Monero's focus on privacy and scalability, I'm curious to know if it meets the criteria for being considered a Layer 1. Could you enlighten me on this matter? Your expertise in the field of cryptocurrency and finance would be greatly appreciated.