Is Polkadot on MetaMask?

Excuse me, could you please clarify for me if Polkadot is indeed supported on MetaMask? I've been hearing a lot about the integration of various cryptocurrencies with MetaMask, and I'm particularly interested in Polkadot. I'm not entirely sure if I'm missing something or if the information I've gathered is outdated. Could you please enlighten me on this matter? It would be greatly appreciated if you could provide me with a concise yet informative answer. Thank you in advance for your time and assistance.