Atomic swaps are being used by many DEX's and dapps to trade bitcoin and ETH like coins with each other --it's not impossible.
Sure it's possible, but I don't know of a usable enough service for atomic swap.
I found only AtomicDEX, but they don't good enougth, they allow use for trade only their own wallet.
U say many, so give me links where i can swap BTC to ETH by atomic swap.
Here are few other:
Use these platforms at your own risk. They can be dangerous and are always potential targets of hacker groups. All these platforms use atomic swap features.
I take a quick look at these platforms, and only AtomicDex of them uses Atomic Swap as technology.
Bisq and hodlhodl is p2p trading platform, but they rely on human who will solve disputes if someone is unhappy by the results of the deal.
So you have to trust these people who run the platform. They can make mistakes and also they can collude with your counterparty.
So they are not actually trustless. They just have no KYC, which is great of course.
Defiswap is just a normal DEX, you can't swap cross chain there.