They were fellow elders together.
There is nothing in that Council of Jerusalem which even nearly resembles the RCC as it is today.
The Holy Spirit through Paul lays out some very specific qualifications for elder and deacon, but nowhere is there any indication of any kind of centralized authority controlling all the churches. They were separate entities, completely capable of being independent and self-sufficient as travel and communication in those days precluded the kind of massive conglomeration of churches being controlled by a centralizes authority we see today.
In addition, it is also a safety valve should error creep into the church, then the whole thing doesn't implode into heresy, there's always a remnant which will survive to pass on the truth.
The council of Jerusalem doesn’t indicate “any kind of centralized authority”?
Ok.
Like I said, I can’t imagine not seeing this, but some do, IMHO, for the reasons I stated earlier as well.