Were that the case we'd have evidence of the "Material culture" of these cultures, yet we do not. Conversely, we have literally TONS of archaeological evidence of Neolithic hunter-gatherer people spread across the entire world during these so called "Lost ages" so personally I think it's preposterous to assume that somehow some advanced civilization that left absolutely ZERO trace of it's supposed grandeur existed beside a hunter-gatherer civilization for which we have plenty of archaeological evidence.

It's a certainly fun through experiment to think of some lost ancient civilization with glittering cities and high technology that was ground down to dust by the last ice-age, but there's literally no factual evidence to support such a notion and plenty of factual evidence to disprove it, so it's best not to get sucked too far down that particular irrational rabbit-hole.