The Sims Mobile are re-running the Treatsylvania Haunt Sweet Treat Showdown starting from November 12th at 5pm UTC.
It will run for 11 days and be available for players level 5 and above.
Award-Winning Tux.
Bearcula.
Skulls and Roses Tights.
Ichabod’s Jack-O-Lantern.
Goth Enough For Ya? Candelabra.
Delightful Cobweb Decal (this item shows as having 6 different colour variants but there are actually 3 different colours. When you get to the bottom 3 colours, which are the same as the top 3, it will switch dirrection on a horizontal axis – pretty cool!).
Intentionally Distressed Wall Decal.
Gothic Cuff Bracelet.
Final resting place Single bed (this was previously in the royal treat box but will now be in the sweet treat box so it’s easier to win!).
Items in the royal treat box.
Do my bidding gown.
Goth enough for ya? Chandelier.
Memento Mori Dining Table.
Memento Mori Dining Chair.
The Grand Prizes.
Rise again coffin bed. 
Hallowed eve up do.
I can’t get this Showdown to load- no matter what I do (including retiring my current Sim and making a new one), when I go to the Sweet Treat Showdown menu “Start” is not a selectable option. This has been going on all year- whyyyyyyyyyyy.
I’d uninstall and re-download the game. Sometimes that fixes weird stuff like that. I don’t think you’ll lose all your progress especially if you’re using an Apple phone it should have the info saved in GameCenter. Good luck!