RTP is a long-run average, not a promise for one session. At 96% RTP, the house...

https://varimail.com/articles/does-session-timing-matter-in-online-casinos/

RTP is a long-run average, not a promise for one session. At 96% RTP, the house edge is 4%. Volatility shapes how uneven results can be; in the short run, you may win or lose far more than the average suggests.