Multiple suppliers requests

Hi guys
Can someone explain to me how this terrible thing works? I created an RFQ, I want to interview other suppliers, I generated requests. What to do next? How does it even work? There is no « reply » button in the supplier portal (from the supplier side). How do I know if they can/can’t deliver it? If an offer from another supplier (not the one for which RFQ was created) suits me, I need to create a new RFQ?