As other repliers have said, this sort of thing is very rare. Trans-Neptunian Objects are so far away that their visible size is absolutely tiny, so occulations are rare and last for maybe a second or so.

But! They do happen and are a great way to learn more about those objects as very briefly you can see something of them. The problem is that first you need to know the exact orbit, then you can predict occulations.

See https://en.m.wikipedia.org/wiki/(486958)_2014_MU69 for an example. It recently had some occulations that have helped better understand it.