Due to the fact they wanted to finish up the Night 2, they have not ben able to focus on the Arcade mode, so people could get a new public update.
Arcade Mode is next on the list of updates, so its possible Itch.io´s public update will be the 2.2 update of the full Night 2.
The Arcade Mode in question is going to get a rework, so wont be long before everyone can play the Arcade mode again.
But depending on how much they have to rework, it could be first arriving in between December and Febuary. But that being said, there is hope for the game will have a working Arcade mode in the future.