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This is highly unlikely. (I expect you misunderstood "myth".)

Every culture and every society has culturally- and socially- -significant things such as customs, habits, institutions, ideas, etc.

Any largish, or even mid-sized, group of children, will eventually ask to have such things explained, or ask how or when or where they originated, or who originated them, or why.

If the answer is a story, as it probably will be, that story is a myth.

Myths don't have to be false. Myths can be true.

They don't have to involve gods or demigods or supernatural anything.

Most of them probably involve culture-heroes, though; but these heroes can be real people.

True myths, that is, myths which are factually true, are likely to also be legends.

A myth is a story that explains;
a legend is a story, based on fact, that, for at least part of its life, was transmitted exclusively mouth-to-ear, rather than being written down and read.

Legends can be true. But, since "the palest ink is stronger than the strongest memory", they're less reliable than written history.

The Kron probably have myths and legends both.

If they have no myths they probably have no culture and no society either, so why would they collectively even be cohesive enough to be given the collective name "Kron"?

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