Have you seen simpleswap.io ?
nostr:nprofile1qqsfrjd9ux5hgsg5cmlz6cdwfh5zv2024g8m2t6g9zqf83l8uqm0svspp4mhxue69uhkummn9ekx7mqpr3mhxue69uhkummnw3ezucnfw33k76twv4ezuum0vd5kzmqpzfmhxue69uhkummnw3ezu7nzvshxweczwanqt showed me sideshift.ai in Riga a couple years ago and it works very well. I used it to swap liquid usdt and lighting, but they support other currencies. You'll need to use a VPN if you're from the USA.
Discussion
Nope. I've only ever used one swap website and it was because of Uncle sending me liquid usdt as mention above.