I spoke with someone at the PROFILE section of College Board today - she appeared to be knowledgeable - she indicated my son would need to indicate which decision plan (ED/RD) he was planning to use.
I spoke with someone at FAFSA today as well, who after coming back from talking with a supervisor told me no school would know what other schools son had applied to, but schools would see a “history” if he had “amended” his forms to include additional schools to receive application, but the record would just not specifying what school(s)