Not quite true, Paul told the Galatians about such an incident.
Are you saying that Paul did not correct Peter face to face over Peter's withdrawal from the Gentiles??
Are you saying that Paul did not correct Peter face to face over Peter’s withdrawal from the Gentiles??
There is nothing recorded in acts of this happening, meaning no witnesses.
The anti Catholic`s want to see more proof other than what Jesus provided about Peter being the rock.
But what ever Paul says is the Gospel.
Something not quite right.