The worshipers at the Temple in Rev. 11:1-2 are primarily Jews who are still part of the Old Covenant. While there will no doubt be those who have come to the Lord because of the rapture, Zechariah 12:10, where the Messiah is revealed to Israel, happens near the end of the Great Tribulation.
The outer court has always been called the Court of the Gentiles, and that may be the reason it’s not being measured. The 42 months is the period of the Great Tribulation when because of the anti-Christ’s claim of deity, the Temple will be made desolate.
Notice how in Rev. 11:2 John identified the place being trampled on by the Gentiles as the Holy City. But in verse 8 he says the bodies of the two witnesses will lie in the street of a place he called the great city, which he further clarified as being the location of the crucifixion, Jerusalem. By saying it was figuratively called Sodom and Egypt, which are anything but holy, I think the holy city and the great city are two different places, which means the Temple he was referring to won’t be located in Jerusalem.