I am trying to find the flight plans of scheduled flights to study and learn from them. In ForeFlight maps screen, I am able to find some scheduled flights but not others. For example - searching for ‘ual1031’ or ‘swa2595’ shows me expected results but ‘AAL1647’ or ‘AAY334’ result in ‘no scheduled flights found’. These are valid flight numbers from Google and I can see them in FlightAware as well, just not in ForeFlight. What am I doing wrong?