I believe the safe harbor election would apply to the return. Each individual property would have to be identified as to whether it is QBI.

I do not think just clicking the box for safe harbor will generate the election as an attachment to the return. I notice that pressing F1 does not produce any result. My guess is that they are still working on actually creating an election, OR that you are expected to create your own wording in Screen 46,  Other Election (Select your own title and text)  See the Critical Diagnostic Warning  about this election.