Sugar Rush 1000 outcomes stay hidden at the start
A 7x7 grid and a 3 to 7 SCATTER trigger do not tell you when the bonus round will come. How often Sugar Rush 1000 reaches its free spins is not known in advance, and the result of one session is random whatever the RTP version. The RTP describes an average over a very long run, not a promise for any single session.
Three RTP versions of Sugar Rush 1000 exist. Which one runs here is shown only in the game rules, so check there before you play. Each version returns a different share of the stake over a very long run, so the version matters for the long-run figure only, not for a single spin.
x25,000 the bet is the cap on the win of Sugar Rush 1000, and a ceiling of that size is reached very rarely. Hitting it needs a long run of multipliers and clusters that lines up, which is not something to plan around.