It is not a myth, no. But there’s no such thing as a separate Kundalini awakening. Kundalini awakening follows a realized mind, it cannot precede it. You may have numerous experiences that people describe as “Kundalini rising”. These are harmless, good experiences, but they are not the goal in themselves and they are not something to focus on. In self-realization, you dissolve into Kunda, that will be the real “Kundalini rising” hehehe. Your previous Kundalini experiences will seem like a child’s play. Focus on the mind, and the body will follow. The body follows the realized mind, not the other way around.