One of the traits Pre-Trib and Pre-Wrath have in common is thinking that the Multitude in Revelation 7:9-16 are already Resurrected (and thus Raptured) because they have White Robes.
Where do they get this doctrine from? Jesus is never described wearing a Robe in his Resurrected state in The Gospels. Nor are Robes mentioned in any of Paul's key discussions of The Resurrection. Revelation 1:13 is a problematically translated verse, it does not use any word for robe, it only used a verb, it should read "the Son of man, arrayed to the foot, and girt about the paps
with a golden girdle."
We won't actually be wearing ANYTHING in the Resurrection, The Resurrection is the restoration to how Adam and Eve were before The Fall. Nakedness is bad only in the fallen state. We will be sort of clothed in light is my personal theory.
Perhaps they think the Robes are symbolic of the Resurrected body. Well both also tend to agree that it's the same multitude seen in in the Fifth Seal, but Pre-Wrath at least sees them as not Resurrected yet at that point. They are already given the Robes there, but they need to wash them first.
Our Resurrected bodies are the same bodies we have now, they're simply perfected. If the Robes are symbolic of anything it' the probably the Spirit or Soul.
Leviticus 16:23 says of the garment The High Priest wears when he enters the Holy of Holies on Yom Kippur. "And Aaron shall come into the tabernacle of the congregation, and shall put off
the linen garments, which he put on when he went into the holy place, and shall
leave them there:". Of course he wouldn't wear this ceremonially Garment for the rest of his life, but that the text is specific about what is done with it shows it has meaning.
The High Priest also had to do special cleansing before he could put that Robe on. I think both the 1st and 10th of Tishrei Holy Days have symbolic meaning relevant to The Second Coming. Verse 24 tells us he then puts back on his regular garments.
Since there is far more evidence the Resurrection of The Church happens latter in Revelation, it's the 7th Trumpet Blast that tells us the time of the dead and the Bema Judgment have arrived, and Revelation 14 describes the 144,000 is clear unmistakable Resurrection imagery (First fruits, redeemed of The Earth). I must conclude that the Robes seen in Revelation Chapter 7 are temporary garments worn during the time those martyrs are physically deceased.
Another issue with viewing this multitude as the Post-Rapture Church is that it's ONLY the Martyrs, it's clearly the same multitude as the 5th Seal, they've defined as all Christian Martyrs, but only the Martyrs. So by definition is can't includes any believe alive at The Rapture.