This one's not a bitcoin fork, ATOMICSWAP called it a token, which means it's an ethereum fork, not a bitcoin fork. this one doesn't even ride on the bitcoin blockchain.
PoW algorithm: SHA256
SHA256 is Bitcoin Fork, not Ethereum Fork
If this coin using ERC20 Token or Fully Ethereum fork, PoW Algo may be Ethash
Too much BTC fork since BCH succesfully, many many and many
or much people want free Money again and again ? ( 1:1 Fork )
Bitcoin gold is Equihash, the PoW Algorithm doesn't mean anything, also if the only way you can get these things is swapping for them, technically there's no proof of work, it's not a coin, it's an ERC20 token. like a token it isn't mineable.