Hezbollah has 20,000 fighters, another 20,000 reservists. 97% of all shias, 35% of all sunnis, 25% of Christians in Lebanon support them for various reasons. Hezbollah is the king maker of Lebanon politics: whoever(esp politicians) goes against Hezbollah in Lebanon will get assassinated.

How many of them are on watch lists? Maybe, 100 to 200. Even the people who are on watch lists travel secretly on middle eastern carriers by using aliases.

I doubt that every member is on a list, and even if they are, there are fake ids. Maybe the airport in Beirut would be cooperative? And it also doesn’t say that they tested every device this way.