How to participate in Whale Treasure event?

Just come back to the game after a few years of quitting. May I ask how to participate in the Whale Treasure event? I click on the event and it takes me immediately to the Exchange Shop. If I remember correctly, it should take me to an island, where I can farm Fin

The event ended a few days ago better luck next time.


The shop is still up until the next event starts in case someone forgot to spend their finns.