The only thing is the no volcanologist can agree on just what will happen the next time the Cumbre Vieja volcano erupts. Even if there is a large landslide, most of the displaced earth may not make it to the ocean’s edge, which will mean a minimal tsunami generated.
If you look at a map, the part of that Volcano that sheared off in the past, was facing North America. Based on what I’ve read (and its minimal, but probably more than the average bear—and not nearly as much as a volcanist) It is feared that the next eruption will wash over the Caribbean and up into the DC area.
In fact, there are signs of tsunamis taking out parts of the Carolinas over the ages. History doesnt always repeat; but sure does resonate from time to time.