We cannot accelerate withdrawals to external wallets.
If there is a delay with your withdrawal, it is likely because the Ethereum network is busy and gas fees are high. Gas fees are payments made to cover the cost of the computing energy required to process transactions on the Ethereum blockchain. Here is a more technical explanation of gas fees.
The busier the network, the higher the gas fees will be to process transactions. This can also result in delays with transactions. You can see how busy the network is on Etherscan.