Before the first Wildies reel stops
Spins on the reels bring the free spins at random, and no one can say in advance how often that happens. Each spin draws its own result, so one session can bring a free spins round or none at all. The RTP shows how much of the stake returns over a very long run, and it does not predict the next spins on Wildies.
Each spin on the reels pays out under one of two RTP settings. The game rules are the only place that names the version in use, so read them before the first spin. The version in use sets the long-run return, which is why the rules matter more than the tile name.
A spin on the reels can pay up to a fixed multiple of the bet, but that top win is a ceiling reached very rarely. Read the maximum win as the upper limit of the game, not as the expected result of a session.