The Millennial temple that Ezekiel saw the plans for and wrote down is not the one that will be built for the soon coming tribulation period.
The temple plans as described in the Dead Sea Scrolls haven't been built yet, and maybe that is the tribulation temple, but the Temple Mount.org has plans for one and I do not know how that lines up with the Dead Sea Scrolls one, but it certainly does not line up with the Millennial temple Ezekiel describes.
There will be a temple built in Israel, and it will be standing in the tribulation.
The Church may be raptured at any time, but may still be on earth when the temple is built, if so, then the Church will also be here when the Psalm 83 war is fulfilled, for the temple can only be built after that war is fulfilled.
But the rapture has no signs, just that we see we are in the very last of the last days of this age, before the Millennial reign, and soon, Jesus will call us to come, and we will rise to meet Him in the air/heaven, and hear Him say, "Come in, shut the doors behind you, and hide yourselves for a little while, till the indignation be past..."-Isaiah 26:19-21