.
It has to be millennial if there is mortality.
We go to the NHNE when the physical/temporal universe is extinguished. If that has not happened, then the millennial period is not completed yet.
Reading The Revelation requires steady attention, since it jumps back and forth constantly, showing what is happening in two very different places at once. These are customarily called “parentheticals.”
.
“It has to be millennial if there is mortality.”
Well, considering that Isaiah 65:17, 18 and 19 all refer to the new heavens, new earth and new Jerusalem, I find it extraordinarily doubtful that Isaiah 65:20 would somehow NOT refer to that period. It seems much more likely that people are misinterpreting 65:20 if their interpretation creates such a blatant contradiction.