I am also a Windows player. The only task that is published in game is Simplified Tasks. You can see this on your Season tab in your Regatta screen. Also that it is Primeval decorations at the Yacht Club.

When the Regatta starts I will update the relevant pages here on the Wiki.

https://township.fandom.com/wiki/Regatta_Seasons

https://township.fandom.com/wiki/Yacht_Club

Last week in the regatta I did not see any Seasonal Tasks. Did you?

I'm hoping they have fixed this and we will get some this week.