Is Binance a layer-1?

Could you kindly explain to me if Binance qualifies as a layer-1? I've been hearing a lot about layer-1 solutions in the blockchain space, but I'm not entirely sure how to categorize Binance within this framework. Could you clarify its role and functionality in relation to layer-1 technologies? I'm particularly interested in understanding whether Binance operates as a fundamental building block or infrastructure layer in the crypto ecosystem. Thank you for your assistance in clarifying this matter.