It can physically change over in a day, they just need to push the seating on the sidelines back to make room for AFL wings. They used to do back to back nights when it was in steady AFL use:
However, notice how there is grass under where the rectangle mode wing seating goes? There's no way they are maintaining turf there these days when it's only used for rugby codes and soccer. It's probable they haven't wheeled the seating back since 2022 and, before that, about 2016.
When Tom Harley said in 2022 that it takes about a month to get ready, I assume that's what he was referring to:
"Accor Stadium was reconfigured to an AFL field for round one this year, and it takes about a month to get it to that to standard as well."
See my post above, I saw a Reel on this last week with someone noticing there appeared to be grass under the extended seating area.