@Robert-and-Janette0 Yes, Airbnb definitely gives new listings a boost in search ranking for awhile, although I don't know how long that lasts. So that could very well be the case in your location.
I was thinking that even if we knew exactly what counts towards ranking and what weight each of those things were given, it wouldn't really help. Because then all hosts would do those things, but obviously not all listings can appear on page one no matter what you do.
What I've always thought would be fair is to randomly shuffle listings on a daily basis, so everyone would get an equal shot at appearing first.
The way it stands now, it can be a vicious circle- if you don't have high ranking, you'll have less visibility and less bookings. If occupancy rate figures into the rankings, which I have seen that it does, then it's hard to get your occupancy up if you're not particularly visible.