Simon Peter is being confirmed in his role to stand for Christ as a temporal shepherd. Notice Jesus isn't talking to anyone but Peter here. There are no other Apostles around--we can't confuse this one as a collective mandate. This is Peter's role.
Some demotion!
Mary Magdalene had more interaction with Jesus hereon. Some promotion!
Where do you get there were no other Apostles around?
John 21:2, “There were together Simon Peter, and Thomas called Didymus, and Nathanael of Cana in Galilee, and the sons of Zebedee, and two other of his disciples”
As to confirming Peter “in his role to stand for Christ as a temporal shepherd” when did Peter take over this role?
When Jesus told Peter to mind his own business?
When he doubted God's command to go to Cornelius?
Perhaps it was when he acted the hypocrite at the church at Galatia around 49 A.D. some 20 years after the ascension. At the Galatians church Paul confronted Peter in front of the church for his hypocrisy. This confrontation was contrary to the etiquette for confronting Elders, yet Paul did not hesitate.
Paul was not impressed with Peter's position and didn't see Peter as head of any church. When he was converted, about 37 A.D., he says he didn't bother with the Apostles but went off by himself to study. He later went up to Jerusalem to see Peter and James, Jesus’ brother, the head of the Jerusalem church. 14 years later (50 A.D.), Paul would say, “But of these who seemed to be somewhat, (whatsoever they were, it maketh no matter to me: God accepteth no man's person:) for they who seemed to be somewhat in conference added nothing to me:” and that included Peter. Paul put his ministry on a par with Peter's.
The church at Corinth didn't see Peter as head of the church when Paul wrote to them around 58 A.D. for they were divided among the followers of Apollos, Peter and Paul.
He wasn't at Rome in 58 A.D. when Paul wrote to the church at Rome. He wasn't in Rome when Paul was first imprisoned there in 61 A.D nor in his last imprisonment in 67 A.D. for there is no mention of him in Paul's letters. He specifically states in his last latter to Timothy all had forsaken him and none stood with him. The only one with him at the time of the writing was Luke.
So when was Peter supposed to take “his role to stand for Christ as a temporal shepherd”?