How to check whether the plane is down? If so, will individuals be notified?

Generally, if you leave your phone number when purchasing a ticket, if there are any changes, cancellations or delays to the flight, the airline will notify you through the ticket office. If you book the ticket online, leave your phone number. The airline will also text you the number. If no such notification is received 3 hours before departure, the flight will generally take off on time.

Of course, if you are still worried, it is best to call the airport where you are flying from and find the service hotline of the airport. It would be safer to call and verify before leaving for the airport