I have no prior experience with the Blue Angels or Thunderbirds, but on 1090 MHz ADS-B I regularly track other military flights practicing at Joint Base McGuire-Dix-Lakehurst, e.g.
There was no trace of the Blue Angels and Thunderbirds on my trackers during the flyovers today, but I did watch 4 KC-10A Extender refueling tankers circle for hours at 20000 feet over New York city. Here is a screenshot as those 4 tankers flew together almost directly over my home following the NYC flyover, on their way to the Philadelphia flyover.
Same here in Atlanta. Angels signal wasn’t picked up by my tracker or anyone else’s according to the site’s live tracker, and weren’t listed as scheduled departure from Cobb County International, where they were likely departing given their planned route.