Especially if the black hole is large. The larger the black hole the weaker the radiation according to Hawking. It is only sizable just before the hole shrinks to nothing.

The radiation comes from virtual pair production right at the event horizon and only if one of the pair is absorbed by the black hole and the other escapes. The escaping one becomes the radiation.

On this basis I do not understand why larger size does not produce larger radiation. But apparently not.

According to a recent paper that I referenced below, the event horizons of black holes can reflect radiation. I also do not understand how this can be.