Simon Peter and his brother Andrew were typically listed first simply because they were the first disciples Jesus chose at the sea shore. Even Matthew 10:2 lists them that way simply saying Simon Peter and his brother Andrew were the first disciples named by Jesus. No other indication is given that gave them more authority.
I would think that a sola scripturist would be quick to quote me, “because I am the least of the disciples, and unworthy to be called one because I persecuted His church.”
But then I’m not one of them, so what do I know?
As for Peter being first, was it also a coincidence that Peter was the one speaking when Christ said, that the gates of Hell would not prevail against his church?