You can do something similar on EF. Set an alert to be notified if the highest booking class in each of business and economy (often J class and Y class) becomes zero ("less than 1"). It may not be an exact replica of what Google Flights does, but it could give some warning that a flight is to be cancelled, at least with the way that some airlines have been working. During the pandemic, it has often given a day or two of advance warning that BA was about to cancel a flight, because the flight would first be zeroed, and then cancelled a little while later.