Integra DRX 5.3

I’m considering the Integra DRX 5.3 AVR for its multi zone capabilities (3 zones) to distribute Roon across 3 rooms in an apartment. I am wondering whether this AVR presents itself in Roon as 3 zones or 1 zone.
If as one, I would be controlling the distribution on the amp and likely limited to one stream? If it presents as 3 zones, then 3 streams ?
Does anyone have first hand experience with this line from Integra?

1 zone, 1 stream