A brief aside about OT prophesies...
At any given time and in any given prophecy, the prophet may be speaking of 2 different occurrences at 2 different times. And the prophet may not know that.
Joel’s one prophecy spoke about 2 events that would happen, but would happen years apart from each other.
a. The first being the pouring out of His spirit in Pentecost
b. The second occurring at the end of the church age.
This means that the first part, I will pour out my spirit, lasts until the end of the age.
As long as the church age is here, God will pour out his spirit.
It didn’t end with the apostles.