Grouping Sonos with Ropieee?

I have a Sonos soundbar and and a hifi system connected to a Ropieee. Is it not possible to group these two together in Roon?

No Roon only supports grouping within the same protocols, so RAAT only groups with RAAT etc.

I did try a Raspberry Pi running Rooopie with a Hifiberry HAT into my old sonos zones at one point, but it was not synchronised properly due to timing issues so I gave that up