Oh yes he did. What is the Gospel of the Kingdom, after Christ's ascension? If you, Israel, as a nation, will believe that Christ is the promised Messiah, as spoken of in the OT, He will return and set up your promised Kingdom. The only difference in the Gospel during His ministry, was that He was right there among them.
In essence, Acts is an extension of Christ's ministry. The only goal in both was the conversion of Israel to believe that Christ was the promised Messiah
The term "Kingdom of Heaven" only appears in Matthew. The term, "Kingdom of God" appears in Matthew and the other 3 gospels. These 2 terms are interchangeable. This is proven when the K of H verses in Matthew are talking about the same thing as a K of G verse in one of the other gospels. For example:
Mt 13:10-11
10 And the disciples came, and said unto him, Why speakest thou unto them in parables?
11 He answered and said unto them, Because it is given unto you to know the mysteries of the kingdom of heaven, but to them it is not given.
Mk 4:11
And he said unto them, Unto you it is given to know the mystery of the kingdom of God: but unto them that are without, all these things are done in parables:
"Kingdom of God" appears 7 times in Acts and 8 times in Paul's Acts epistles. All the verses below speak of the same thing
Jesus Christ
Mk 1:14
Now after that John was put in prison, Jesus came into Galilee, preaching the gospel of the kingdom of God,
To Jews in Acts
Acts 8:12
But when they believed Philip preaching the things concerning the kingdom of God, and the name of Jesus Christ, they were baptized, both men and women.
Ac 19:8
And he went into the synagogue, and spake boldly for the space of three months, disputing and persuading the things concerning the kingdom of God.
Ac 28:23
And when they had appointed him a day, there came many to him into his lodging; to whom he expounded and testified the kingdom of God, persuading them concerning Jesus, both out of the law of Moses, and out of the prophets, from morning till evening.
To Gentiles in Acts by Paul
2Thess 1:5
Which is a manifest token of the righteous judgment of God, that ye may be counted worthy of the kingdom of God, for which ye also suffer:
1Cor 6:10
Nor thieves, nor covetous, nor drunkards, nor revilers, nor extortioners, shall inherit the kingdom of God.
The only thing Paul ever preached, the proof that Christ was the Messiah promised in the Old Testament
Acts 26:22
Having therefore obtained help of God, I continue unto this day, witnessing both to small and great, saying none other things than those which the prophets and Moses did say should come:
The same thing preached in the Gospels, The Gospel of the Kingdom, was preached both to Jews and Gentiles during Acts. Why, because both had an identical goal, the repentance of the nation of Israel, so Christ would return.
What everybody preached during Acts has always been tricky. Paul also preached the Gospel of Christ, the Gospel of God, and the Gospel of the Grace of God. I think that Paul took a few of the Jews and quite a few Gentiles a bit further, on the side. These, I believe, are the first members of the brand new church that formed in Paul's 7 after-Acts epistles.
The term, "Gospel" means "good news" or "glad tidings". Nothing more, nothing less. It's a very generic term
Yet you never address (Matt. 10: 5-7). Why?
The 'kingdom of Heaven' in Matthew is in the kingdom of God. It doesn't mean both are the same.
You say the only thing Paul ever preached was the Messiah promised in the Old Testament. That is not true. See (Eph. 2:11-22).
In other words, the Gospel of the kingdom is not the Gospel of Grace that Paul preached.
Stranger