Hi Clare and welcome to the Disney Parks Moms Panel!
I am notorious in my family for changing our FastPass+ selections. I am always looking for better times or different selections. If you open
My Disney Experience on your smartphone and click on a
FastPass+ selection, you will be given three options. The options are Cancel, Find on Map, and Modify. You need to click on Modify. You will then be able to select the people for whom you want to modify selections. After selecting the party, you will click continue. You will then see what other FastPass+ selections and times are available. Your original FastPass+ selection will not be canceled until you confirm the new selection.
I have two hints. The first hint is to see if any other Tier 1 choices are available, you will need to try to Modify your original Tier 1 FastPass+ selection. The second hint is to keep checking. I check multiple times before and during my vacation. I use travel time on Walt Disney World Transportation to check FastPass+ selections, too. You never know when the selection you are looking for might pop up!
Clare, thank you for visiting us with your question. I hope you'll let us know if we can help you with any other questions!
Wishing you a magical vacation,
Amy H.