Ogg instead of Flac

I’ve been listening lately to hi-res radio on Rose Radio connecting directly to streams found on specialised pages, but when I choose a FLAC stream the data on the display indicates that OGG format is used, never FLAC. Why is this happening? Thanks in advance

@Luisrc

We are here to answer your questions.

RoseRadio operates by using the streaming URL of the radio channel.
The streaming URL is shown as transmitted by the station, not separately displayed as OGG. So the stream data is exactly what the radio station transmits.

Thank you