Is Ethereum a layer 2?

Excuse me, could you clarify for me if Ethereum is indeed considered a layer 2 solution in the blockchain ecosystem? I've heard conflicting opinions on this matter, and I'm curious to understand your perspective. As I understand, layer 2 solutions are often referred to as technologies that build on top of existing blockchain networks to enhance their scalability, throughput, and reduce transaction fees. So, does Ethereum, as a platform itself, qualify as a layer 2, or are we referring to specific solutions or protocols that operate on top of Ethereum's layer 1?