The airlines are having issues getting staff to turn up to work. Some flight crew initials have been cancelled because the pilots had better offers elsewhere. It takes quite a while to recruit and train a pilot. Cabin crew are doing the same as well as resigning at a higher number simply because they can get a better paying job elsewhere.
So if that's just the airlines, I can only imagine the airport service staff, immigration/customs, baggage handlers etc are probably doing the same.