Great question! Homes that are listed as “open to inquiries” are ones where the host has not indicated that their home is available, nor have they requested a swap to your area. We typically recommend focusing on homes that have the "available" or "seeking swaps" tags as more probable options!
However, we just rolled out a new feature where for homes listed as "open to inquiries'', you can request to swap with members directly in the app! If you download the latest version of the app, you should be able to send swap interest there directly by clicking "send swap interest" on the home page of the home you're interested in swapping with! (iOS or Android)