I believe you are mistaken in the authenticity judgments on an apparition.
Do you know what they are? And it’s not necessarily all in Scripture.
Remember the Catholic Church has Holy Tradition — and the Bible even talks about this Holy Tradition of truths being handed down from one person to another by mouth.
Salvation, I said apply the Scripture test. I didn’t say what that test is. The fact you would shove it aside without a definition says a lot.
The apostle John puts it this way:
1Jo 4:1 Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world.
God’s Word is inspired by Him and will not contradict Him for He will not contradict Himself. So too - anything extra biblical will not contradict Him either. Test it by the Word of God. If it contradicts toss it. Satan is a deceiver. Be not deceived.