My "take" is this:
The destruction of Jerusalem and the temple was the fulfillment of Christ's promise to use the Roman army to completely destroy the temple and the city. Luk 21:20KJV Luk 19:44KJV This was, as Tet has said, a coming (appearance) in judgement (only) but not "unto them that look for him" as mentioned in Hebrews but, rather, unto those who did not look for Him.
Why did you alter the passage?
He will appear to "them that look for him", those of faith, the redeemed, at a different time than when He appeared in judgement upon His enemies in 70 A.D. I do not disagree with the historic church that this will be at the end of time. So, to put it succinctly, believers are to look for His return for them.
"So, to put it succinctly, believers are to look for His return for them."
So, did the "Second Coming" already happen, and the events depicted, in the book, associated with "the second time? Is your view that He will come again, per the above?
I don't see anything significant about the "second time" mentioned in Acts when compared to it being mentioned in Hebrews other than as a historical fact. It is no more or less significant than Gen 22:15KJV
No "type" pictures all of the Lord Jesus Christ-granted. Isaac, Jacob, Joseph Moses,......all "types," portray the Saviour, in some aspect, but not all.
Joseph is portrayed as a type, was also hated by His brethren and given over to death, but later became an exalted ruler and the Saviour of His brethren, the very ones who got rid of Him... Acts 7:13 KJV: Stephen's statement is, “the second time Joseph was made known to his brethren.” Why significant? While the nation Israel had rejected Him, His first coming/advent, Peter, and the gang are now offering His return, per prophecy, to bring in the “Times of refreshing” if Israel repents as a nation...Act 2 KJV ...The context of Stephen's "sermon." The "Jewish leadership," "El the Sanhedrin," knew the prophecies, quite well, and they knew that one day the Messiah/Christ would come to establish the earthly kingdom. But they did not want to believe that this "Jesus" of Nazareth was the Messiah/Christ. Thus, the purpose of Stephen's sermon- They had rejected this Jesus Christ,demanding his death, by crucifixion. They, like the brethren of Joseph, had considered themselves to be rid of Him-forever. But now, the second time, this "Jesus" who had been humiliated, is being presented to them as the Christ, the Messiah, of prophecy.