Since 1987 a card-carrying* Baptist Fundamentalist, I do not say the Bible is self-authenticating. The prophecies and the miracles authenticate it if they are true. Conviction by the Holy Spirit also authenticates it in the same way that you would authenticate a witness testimony by looking into the eyes of the witness and knowing that he speaks the truth. It is better to think that the Bible authenticates Jesus Christ. But I would prefer not to get into strivings of words.
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*Yes I have an actual card in my wallet. It is a membership card signed by Dr. Rod Bell and issued by the Fundamental Baptist Fellowship, dated 1987. Now renamed the Foundations Baptist Fellowship International, (I am late paying my dues this year) we had a Southwide Region meeting on zoom last month with Pastor Tony Facenda as moderator.
I understand your point, as I discussed in post 10. I’m sorry for the imprecise terminology, but I was using the language of the OP.