Connecting the LP10 to a web streaming service without an app

Hi,
I’m working on a small multiroom system with Arylic, using the LP10s, because the client already has two zones from an older audio system and wants to listen to music both independently and as a single zone.
I found a service Musica legale per parrucchieri senza SIAE | SoundToro
that allows you to manage your music without running into legal issues…
The service streams via web browser; it doesn’t have an app. I’m wondering how I can connect it to the LP10, or are there other services I can use to use the LP10?
Do I still have to use a PC/tablet/smartphone to manage the music I send to the LP10, or can I connect directly to a streaming service and use my smartphone only to adjust the volume, link devices, and select which playlist to send?
Thanks