Hi @Stephanie_Watanabe ! Welcome to the Community forum 
!
Glad to hear that you have been giving the new app builder a try! Since it is in beta at the moment, there are features that are not available yet that we are working on adding in the future.
We have added your +1 to public app sharing, and I recommend that you also follow this thread for any new updates on this feature for the new app builder!
-Jen