No extraterrestrial life has ever been found and we only know of one creature that has formed a civilisation: Homo sapiens. And we have not yet reached type I.
So we know nothing from observations about civilisations that are beyond our own. Kardashev wanted to have a way of thinking that didn't put "humans" at the top, so he described types I, II and III. These give us a way of thinking hypothetically about possible extraterrestrial intelligent life and breaks us free from a human-centred point of view.
Now it might be hard to detect type I or II civilisations, but a type III civilisation would, it seems likely, have profound effects on all worlds in a galaxy or at least the region of a galaxy in which they existed. There does not seem to be any type III civilisation in our part of the galaxy.
Moreover going from type II to type III requires taking over large amounts of star systems and this bumps up against the "space is big" and "you can't go faster than light" problems.
That said, in fact we have no idea if any life form in the whole universe has ever even reached type I
Type 4 and 5 are later additions to the system and there is no standard definition of what type 4 or 5 are (you can extrapolate logarithmically, or you can add some alternate measure of civilisation such as "data processing".
We cannot understand advanced civilizations, we cannot predict their behaviour. Thus, the Kardashev scale may not be relevant or useful for classifying extraterrestrial civilizations.