Yes, BC Vault supports Ethereum PoW and any other Ethereum EVM Networks, please see:
Custom EVM (Ethereum type) Networks
Custom ERC20 (BSC20, CRC20...) Tokens
Once you will have ETH PoW Network defined in the BC Vault, you can simply copy your existing ETH wallets to ETH-PoW and you will see your original airdropped ETHW (see: Copy wallets between compatible networks).