I have noticed a lot of Evangelicals who seem to think the dead are all asleep until the Final Judgment. It’s a phrase that was used in the early Church a lot, especially by St. Paul. I don’t think it means what they think it means (obviously), but if you cut yourself off from the sacred tradition, you have to basically interpret texts as you receive them. This is how many of them do it.
One example to contradict the supposition, I suppose, would be pointing out where the early Church referred to the Dormition as the Blessed Mother falling asleep. But clearly the Blessed Mother is not literally sleeping somewhere between the physical universe and Heaven.
Another example would be to point out that during the Transfiguration, both Elijah and Moses were present with the Jesus and the three apostles. Those persons were obviously not asleep. They were alive and conscious with Jesus.
I think what happened here is that moderns are interpreting a phrase used in late antiquity in a way that it was never originally intended.