The Minoan civilization disappeared (possibly being partially incorporated into the Mycenaeans') about 300 years before the disappearance of Mycenaean culture along with the other late Bronze age hullaballoo. https://en.wikipedia.org/wiki/Late_Bronze_Age_collapse
Yes, the Greeks are the descendants of the Mycenaeans, but Minoans were a totally different civilization. Different language, different people.
For what we can read, and archeologic findings, the Minoans civilization collapsed and disappeared