Hello Nicole!
I am glad you stopped by to ask a question at planDisney! It is so exciting that your Walt Disney World vacation is almost here!
Yes, it is possible to sitch your park reservation days without canceling your park reservations, but you will have to have
Guest Relations do it for you. My recommendation for you is to go to the Guest Relations Lobby at Disney Springs Welcome Center located in the Town Center area of
Disney Springs on your arrival day (1/9/2022). The Cast Members at Guest Relations can see the theme park availability for those specific days. If there is availability, they can switch the park reservations for you. It doesn't hurt to ask. You can also go to the Guest Relations in a park, but you would have to enter a park, so this would not work for your particular situation.
In my June 2021 Walt Disney World vacation, I was able to go to the Disney Springs Welcome Center and change my park reservation days because there was park availability. I was also able to add one of my linked friends to my park reservation because of the Cast Member's magic.
I hope that your upcoming Walt Disney World vacation is truly magical in every way!
Marc L.