I can't see anything here that's notably different from Radio Garden.

Radio Garden got so popular that they were forced to stop streaming stations from outside the UK to listeners inside the UK. [1] This is thanks to a lawsuit involving TuneIn Radio that suggested this might break copyright / licensing restrictions.

I've had to listen to Radio Garden through a simple SOCKS proxy on a Fly.io server outside the UK ever since.

I imagine this will catch up with this site in due course as well.

[1]: https://radio.garden/settings/uk-statement

EDIT: Here's a link to a story discussing the copyright infringement verdict and the subsequent appeal: https://www.musicbusinessworldwide.com/tunein-loses-appeal-a...