First of all, fondant is my life
Fondant do not need freezing. Unless what is in the cake is the reason why. After u cover your cake w/ fondant or decorate , assuming no buttercream is on it, wrap the entire cake w/ plastic wrap while it is in the fridge. Fondant can get moist or wet uncovered when you take it put of the fridge. I have never frozen a fondant covered cake. When I was entering in competitions, I make my cakes ahead of time, freeze them undecorated, then cover it w/ fondant then refrigerate loosely covered w/ plastic wrap . Fondant takes months or even never for it to go bad, it will just get very firm and dry. but no funny smell or molds or anything like that, BUT, if it is just “dots”, u can add those dots on there on the day you need the cake. If not small pieces of fondant should be fine to freeze. At first I was thinking the entire cake. Fondant is fondant, chocolate or not. One reasons why I use fondant a lot, it that they are so easy to deal with. No fuzz no mess and they can be colored beautifully colored. With fondant you can make anything, flowers, drapes, figures, any shape any form. And you if you make a mistake, you can just easily pick it up and redo it.
Can’t wait to see your creation.