You can make FastPass+ reservations depending on your resort stay. Based on the information provided from the "Pick Your Date and Park" notes:
If you are not staying at a Disney World resort, you can begin making your FastPass+ selections up to 30 days in advance of your trip.
This booking window allows guests staying off-site to plan their park days and reserve access to attractions, shows, and character greetings in advance. Utilizing your FastPass+ selections can significantly enhance your park experience by reducing wait times at popular attractions.
It is recommended to make your FastPass+ selections as early as possible within your eligible booking window, especially for high-demand attractions, as availability can be limited.
