“Bishop of Rome” isn’t the title authority of the Pope, That’s simply the headquarter location of his diocese. The key to Peter is just that... the Keys. It’s Peter’s primacy and succession that matters.
**The key to Peter is just that... the Keys.**
Peter used the ‘keys’ alright. He was the preacher that was present when the Holy Ghost was initially poured out to the three segments of the population; ‘opening’ the doors to the Jews (Acts 2), the Samaritans (Acts 8), and the Gentiles (Acts 10).
Was Simon Peter the first to discover that Jesus was the Christ? No:
Andrew realized that Jesus was the Christ before Peter: “He first findeth his own brother Simon, and saith unto him, We have found the Messias, which is, being interpreted, the Christ.” John 1:41.