Does Fidelity offer Crypto to 401(k) accounts?

I'm curious to know, does Fidelity Investments, a well-known financial services company, currently offer the option to invest in cryptocurrencies within their 401(k) retirement savings plans? With the growing popularity and potential of digital assets like Bitcoin and Ethereum, I'm wondering if Fidelity has adapted to meet the evolving needs of investors looking to diversify their portfolios with this emerging asset class. It would be great to get a clear understanding of whether Fidelity allows for such investments and what the process or any potential limitations might be.