There's a bunch of people who think Jesus's Millenial Kingdom happened on earth already and that our minders have played with historical timelines to hide it.
Usually they're people studying a theorized "mud flood", or "Tartaria" or even maybe "The Carrington Event".
Have you heard of these?
I watch a YouTuber named Jon Levi, who's videos are pretty interesting, but I don't quite know what to make of it. His -as well as others'- arguments are compelling.
I just don't know.
Revelation can be hard to figure out, but in the end, I don't WORRY about any of it. We'll know what we need to know, when we know it.
Maybe not everything spelled out in Revelation happens in chronological order.

Johnny Enlow did a dive into Revelation with a different look than I have heard through my 66 years of studying and attending Bible college. He was true to scripture and compelling in what he said. I heard him on Elijah Streams a couple of months ago. He is usually on every Monday. He has given prophetic words and godly guidance to leaders and presidents in other countries.