Cboe BZX Exchange has filed a proposal to allow staking in the Fidelity Ethereum ETF.The proposal aims to enable big investment funds to join the Ethereum ecosystem through staking without running their own infrastructure.Regulatory changes under Mark Uyeda may improve prospects for staking-enabled ETFs, aligning traditional finance with Ethereum's proof-of-stake model.If approved, the Fidelity Ethereum ETF could be one of the first financial products combining ETF advantages with Ethereum staking.