Acts 8 28-38 Phillip preached the Gospel to the Ethiopian Eunuch and like all Accounts of salvation water baptism to place.
The book of Acts is a transitional book that give the account of God shifting gears from the Gospel of the Kingdom to the Gospel of Grace and it has to be read as such. Phillip was simply doing what all that he knew at that moment. God had not yet revealed to Paul, the priest of the Gospel of Grace and the one that God would use to teach the apostles accordingly, about the age of Grace. Repent and be baptized was the Gospel of the Kingdom, intended for the Jews and ushered in by John the Baptist. The Jews rejected their Messiah and nailed him to the cross and God shifted gears to the Gospel of Grace, intended for Jew and Gentile alike in this current age, which says to believe in the death, burial, and resurrection of Jesus Christ. Same Messiah, 2 different dispensations/ages.
and like all Accounts of salvation water baptism to place.
For one example, Acts 10:44-47 sure seems to show otherwise.
Ephesians 4 4-6 there is only one Baptism
Exactly...the baptism of the Holy Spirit which all believers in this age, jew and gentile alike, share. Same teaching as I Corinthians 12:13.