Why did they say the found the last living pygmy wahle

Okay I just read an article about it and I heard tye found the "last" living pygmy whale,they thought the whale was extinct for two million years so doesn't that mean that that whale must have parents(whale was a juvenile) and perhaps there are many out there just maybe out of human eyesight , it just puzzles me that they'd say they found the last living one when the presumably thought it was extinct for 2 million years

You misunderstood the article or read it wrong.

They know that species is still around, it is that the group that that species belongs to went extinct 2 million years ago and they have yet to figure out much about this species or why this one is still around. I think there have only been about a dozen sightings in the last hundred years or so.

Here is a quote from one of the articles about it... "The pygmy whale, a cetacean that looks radically different from all living whales, is actually the last living member of a group thought to have gone extinct 2 million years ago"