The temple of Rev.11:1-2 is not in heaven.
The temple of Rev.11:19 IS in heaven, so why is that given as the last verse of Rev.11? It's so as to compare God's Temple with the false temple at the start of the chapter.
Rev 11:1-2
1 And there was given me a reed like unto a rod: and the angel stood, saying, Rise, and measure the temple of God, and the altar, and them that worship therein.
2 But the court which is without the temple leave out, and measure it not; for it is given unto the Gentiles: and the holy city shall they tread under foot forty and two months.
(KJV)
John was given a "reed like unto a rod" to measure that first Rev.11 temple. Why was the reed "like unto a rod"? That means the reed was not simply for the purpose of measure; not some simple measuring stick. That word 'rod' can mean a staff for walking or punishing, or a royal sceptre, even a rod of iron like what Christ is to rule with when He comes. Verse 2 connects that time with the time of the beast's rule of 42 months, so that rod isn't of Christ. John was shown a group that worship within that temple, so there's worship going on, but what kind, and who to? During that 42 months it sure isn't our Lord Jesus being worshipped there, so who will it be?
Those verses are referring to worship inside a temple in Jerusalem, even referring to an altar and an outer court pattern like the previous Jerusalem temples. It's then important to next consider what would have be re-established in Jerusalem for that to happen. There's been loads of signs since the last decade of the orthodox Jews in Jerusalem intent to build another temple, and start up Old Covenant style worship there again. Some Islamic clerics are now saying a Jewish temple would be OK as long as it doesn't conflict with the Dome of the Rock that stands upon the Temple Mount in Jerusalem.
Later in the Rev.11 chapter we're told God's two witnesses will appear there and give a Testimony for 1260 days, roughly the same time period as the 42 months. Then the beast that ascends from the bottomless pit will kill them. So WHAT beast is that? Let's see, so far we've got a temple, an altar, and a group that is worshipping therein, and Gentiles treading the outer court, which to tread the court is also an expression God used in Isaiah 1 to represent those of His people who come to Him in falseness and are not accepted. Along with that Message in Isaiah 1, God tells them to bring no more vain oblations and sacrifices to Him, that He's tired of all that. Yet that's exactly what the orthodox Jews in Jerusalem intend to offer Him in our near future.
That's the temple Apostle Paul referred to in 2 Thess.2:3-4 about the "man of sin" coming to sit in it, to show himself that he is God. That's also where our Lord Jesus was ultimately pointing to with the "abomination of desolation" prophecy from Daniel 11. That must occur prior to our gathering to Christ Jesus.