Well if you are asking if I as an “individual” have Petrine Authority, the answer is emphatically NO. I don’t get to authoritatively interpret scripture. That is power to instruct ONE truth that was handed specifically to Peter and his successors as part of One Church.
Well then, under the conditional understanding of 'Petrine authority' as you call it, as you described it to be empowered; if you have none of that sort of authority, then why are you taking it upon yourself to assert your own opinions as authoritative?
For if you have none of that sort of authority yourself --- then how could you ever determine if some other was properly interpreting the Scripture --- or not?
In fact -- how could you ever determine which theologians among the Roman Catholic were properly assessing Scripture, without yourself having to rely upon yet others as being those with some measure of true "authority"?
I know of one who does hold true authority.
That One is the author and finisher of my faith (Hebrews 12:2).