Hi, Braydon! Welcome to the Disney Parks Moms Panel and thanks so much for stopping by with your question. I was recently watching the Advance Dining Reservation page for
Frozen Ever After Dessert Party and Magic Kingdom Park's
Fireworks Dessert Party to release dates during my family's trip early In Summer, so I understand your situation! Thankfully, I did not just Let It Go, as those did recently open and our itinerary is finally not just a bit of a Fixer Upper. For the First Time in Forever, I can say our plans are complete and we are ready for Coronation Day!
Braydon, while most Advance Dining Reservations open 180 days in advance, the ones for most of the dessert parties work a little differently. They tend to open a bit later, and you will notice a whole month or more open all at once. I recommend you check the page for Frozen Ever After Dessert party every now and then just to see if some have appeared. I have not heard of any scheduling changes for it at this time, so hopefully you will have your own Coronation Day soon!
Thanks again for stopping by and please let us know if we can help you again as you continue to plan your trip to Walt Disney World Resort.
Brandy