Before your first spin, the trigger stays hidden
Each spin lands a new set of symbols, and the bonus round can start on any of them. How often it comes is not known in advance. The result of one session is random, whatever the RTP version in play. Two sessions on the same slot can end in opposite places.
The reels run on one of two RTP versions, and only the game rules show which version Rollxo Casino runs. Both versions pay back at different rates over the long run, so the rules are the place to check before you play.
Winning combinations on the reels can pay up to x3,000 the bet, which is A$3,000 on a A$1 stake. That ceiling is reached very rarely, and no one can predict when a spin will land near it. Treat the maximum win as the top of the paytable, not as an expected result.