Access to usb host midi ports

On the editor, we have access to midi din port 1 and 2. I connected a synth to usb host port. It’s recognized, but no additional ports (from the host port) in the editor. Are the host ports totally independent (2 midi + 2 host = 64 midi channels) or do they use the midi din channels (via the router), so 32 midi channels available in total.

While i’m talking about host port. Any recommandation for a small (tiny even better) usb hub with 2 ports, to take advantage of the 2 ports offered by the host port? Thanx a lot