That's the first time I have heard of anyone getting a telephone call from USNA to notify them that they would probably not be getting a nomination (whether in general or from the VPOTUS).
As for the Vice President, she can have up to five (5) nominees at any one time attending each of the academies which require nominations (USMA, USNA, and USAFA). That's fifteen (15) nominations, total. Now, they say that there are "typically only one or two vacancies per year", but they don't say whether or not there is a "reset" when a new VPOTUS takes office. In other words, if VP Pence had filled all those spots (and none of them commissioned last year), does that mean that VP Harris doesn't get to nominate anyone this year? Of that salient point, I am not sure.