Can DApp users use ETH on POA network?

If I have a DApp on Ethereum that works with users depositing and/or using ETH with a smart contract, and say I want to also make this DApp available on the POA network, what would I need to do about the currency?

Will I need to exchange any mention of ETH to POA? Is something like transaction.value automatically POA on the POA network?

POA native token is an equivalent of ETH on Ethereum network.