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?

You should be able to deploy on POA and you are good to go - POA will replace ETH. Good luck!