I am now attempting to make use of Koala for the first time so by no means am I an expert on their rules and regulations. But, as far as I know, they won't accept any listing unless you already have a week locked in, and have written documentation of the specifics: resort, dates, unit size.
I own a floating week and used that floating week to lock in a 2025 Christmas week. I later scanned and emailed them a reservation confirmation. Koala initially rejected my listing as my owner services confirmation failed to indicate that the reservation was for a 2 BR as I had claimed in answering their online questions. So I had to then scan and email them my annual bill that DID specify that I was being billed for and owned a "2BRSAT" (2 BR Saturday to Saturday) floating week, they saw that my bill's owner ID was also on my reservation confirmation, so at that point they felt confident enough that I was indeed renting out a 2 bedroom. Only then did they accept my listing.
So I very much doubt that you can casually say, "I have a long list of potential dates that I can lock in so make them all available to prospective renters".