It is in deed a fact that this was in former times, as you correct statet in Acts, but it was not taught and repeatet in the bible. The events you mentioned were to show that Jesus came not along for the jews, but for everybody.
The biblical record of the exchange between Apostle Paul and the Ephesus disciples 20 years after Pentecost contradicts that idea.
Also noteworthy is the fact that Paul went with these men and shared what he told them with others. Paul witnesses to these people for 3 months. Some accepted the message he had given the 12 others, and some did not. This is seen in verses 8-9. Verse 10 points to his ministry continuing to both Jews and Gentiles in Asia for 2 more years.
Acts 19:1-10
"And it came to pass, that, while Apollos was at Corinth, Paul having passed through the upper coasts came to Ephesus: and finding certain disciples,
2 He said unto them, Have ye received the Holy Ghost since ye believed? And they said unto him, We have not so much as heard whether there be any Holy Ghost.
3 And he said unto them, Unto what then were ye baptized? And they said, Unto John's baptism.
4 Then said Paul, John verily baptized with the baptism of repentance, saying unto the people, that they should believe on him which should come after him, that is, on Christ Jesus.
5 When they heard this, they were baptized in the name of the Lord Jesus.
6 And when Paul had laid his hands upon them, the Holy Ghost came on them; and they spake with tongues, and prophesied.
7 And all the men were about twelve.
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.
9 But when divers were hardened, and believed not, but spake evil of that way before the multitude, he departed from them, and separated the disciples, disputing daily in the school of one Tyrannus.
10 And this continued by the space of two years; so that all they which dwelt in Asia heard the word of the Lord Jesus, both Jews and Greeks.