Is Doge a Layer 2?

Excuse me, could you clarify whether Doge, as a cryptocurrency, operates as a Layer 2 solution? I understand that Layer 2 refers to protocols or technologies that build on top of an existing blockchain, often aimed at improving scalability and transaction speed. Given Doge's popularity and its use of the Dogecoin blockchain, I'm curious if it incorporates any Layer 2 advancements or if it remains primarily a Layer 1 protocol. Your insights would be greatly appreciated.