How often do Barn Festival bonus features land?
Symbols land on the 5x4 grid in random positions, and a run of tumbles can lead into a bonus feature. Nobody can know in advance how often those features come, because every spin is random. The result of one session stays random as well, whatever the RTP says about the long-run return.
Each spin lands symbols on the grid as the reels show them, and the RTP version running here is shown only in the game rules. Open that section before you judge how much this game returns over time, because the rules name the version in use.
Winning symbols tumble away and new ones fall in, so one spin can keep paying across several rounds of wins. The maximum win is a ceiling that players reach very rarely, and no one can say in advance whether a session will come near it.