I don’t see what in the Bible
Your Bible is translated from Greek manuscripts.
If it is not directly translated from Greek, you would have a poor translation.
Certainly not an article of faith. Just a fact of transmission.
That the surviving MSS are in Greek does not, in itself, show that the originals were in Greek or that the Dominical dicta were spoken in Koine (though it wouldn't astonish me if they were. A problem with Gibson's "Passion" IMHO was that the stuff that was said in Latin should have been said in Koine.)
And Paul's calling Peter "Cephas" is interesting.
The question of literal inspiration and reliability gets complicated when the variant texts are considered.
But, in any case the Petros -- petra controversy isn't going to be resolved tonight.