Peter himself never ventured outside of Israel in furtherance of the "great commission." Nor did James, John or any of the circumcision apostles.
You're trying to build an argument on silence.
Just because there is nowhere in the NT that says Peter ventured outside of Judaea, it doesn't mean that Peter didn't.
John wrote the Revelation from Patmos.
Patmos is outside of Judaea.
They confined their ministry to "the circumcision," which included writing to believing Kingdom Jews scattered abroad at the death of Stephen (the dispersed, 1 Pet 1:1; Acts 8:1; 11:19) as well as those who'd gone further afield.
Peter preached the gospel to the circumcised, and Paul preached to gospel to the uncircumcised. Both Peter and Paul at times preached to both, but Peter concentrated on the circumcised, while Paul the uncircumcised.
Same gospel, two completely different groups of people.
The important point is: as far as God tells us, the circumcision apostles never set foot outside of Israel,
Again, you're building your case on silence.
Jesus told Peter the following:
(Acts 1:8) But you will receive power when the Holy Spirit comes on you; and you will be my witnesses in Jerusalem, and in all Judea and Samaria, and to the ends of the earth.”
We know that Peter preached in Samaria
(Acts 8:25) After they had further proclaimed the word of the Lord and testified about Jesus, Peter and John returned to Jerusalem, preaching the gospel in many Samaritan villages.
So, Acts 8:25 proves that Peter and John preached outside of Judaea.
and with Israel set aside in unbelief,
This is a myth that you Dispies keep repeating over and over again. Nowhere in the NT does it say Israel was set aside.
Darby invented this myth, and you guys perpetuate the myth.
no holy priests went forth unto the Gentiles. Only Paul did, and he never refers to himself as a priest.
Probably because the Gentiles had no idea what the Levitical priesthood was.
Paul tells the Gentiles they are part of the Royal Priesthood:
(Eph 2:19-22) Consequently, you are no longer foreigners and strangers, but fellow citizens with God’s people and also members of his household, 20 built on the foundation of the apostles and prophets, with Christ Jesus himself as the chief cornerstone. 21 In him the whole building is joined together and rises to become a holy temple in the Lord. 22 And in him you too are being built together to become a dwelling in which God lives by his Spirit.
It's the same one spiritual house that Peter tells his audience they are lively stones in.
Come back when you're able to handle God's Word with reverence.
If you ever realize Darby's teachings are false, you just might understand the Bible.