They are not the bride. They are the invited guests to attend the wedding feast.
Now wait a minute......because in Rev.19:7
we have the church in heaven as ‘Christ’s bride’ at the “marriage of the Lamb” (not the marriage supper, v 9, which takes place later on earth when Christ introduces His bride to those who enter the Millennium).
Christ’s bride is composed of the saints of all ages to that time, is in heaven (having been resurrected and raptured there) and comes with Him at Armageddon as Zechariah:14:5 and Jude 14 declare (“all the saints with Him”).
That Old Testament saints will be part of the church seems clear also from Christ’s statement that... “Abraham rejoiced to see my day: and he saw it, and was glad” (Jn:8:56
) and Hebrews 11 where Old Testament saints are linked in their destiny both with heaven (v 16) and with New Testament saints (v 40).
Those martyred during the Tribulation are resurrected after Antichrist is “taken ...and cast alive into the lake of fire” (Rv 19:20) ...and Christ is on earth, they will not be raptured to heaven but gathered by angels, along with the living remnant of Jews not in Israel, into His presence on earth: ....
“Immediately after the tribulation... shall appear the sign of the Son of man in heaven...they shall see the Son of man coming in the clouds of heaven with power and great glory. And he shall send his angels...and they shall gather together [to Jerusalem] his elect from the four winds” (Mt 24:27-31).
The Jews so gathered will be in the earthly kingdom ruled by Christ, while the Tribulation martyrs will reign with Christ over the millennial kingdom.