Satellite unit for LBR20

Hi all,

I have had a search but can't find a definitive answer. I have an LBR20 Orbi box which I use as my 4G modem. I now want to purchase one or two satellite units to expand the range, but I am not sure which (if any) are compatibale. On the information sheet it says;

"Router with integrated cellular modem is
compatible with select Orbi AC Satellites
to create a mesh WiFi system"

But it doesn't say which units these "select" systems are. Can anyone point me towards a list of compatible satellites?

Thanks in advance...