No, the event is not preserved in Scripture. But it is preserved in the tradition of that same Church that preserved what Scripture we have. And I ask you to note that the New Testament was never intended to be a comprendium of all doctrine, nor a history of of the Church. Not to trivilize, but it has some of the characteristics of a family scrapbook,where generations later, the descendents of the compilers do not know anything about that guy with his arm around Uncle Harry except his name, What does the Bible tell us about Apollos, a man whom Paul greatly admired? That he was an apostle of the Lord, a preacher of great effectiveness. To many other names, no deeds are attached.
The Bible "preserved" by Romee (the Western/Minority Text) is that with its source in North Afracan manuscripts that sat in the hands of Alexandrian corrupters for the first 300 years of Christianity until Constanine ordered 50 copies of it brought to Rome.
All the while, common, evangelistic Christians had been for those 300 years copying and re-copying the overwhelming majority of the New Testament manuscripts that are the Antiochan/Byzantine text.
These soul winning believers, never connected with Vaticanism, had already a full New Testament in Latin 200 years before Jerome, and translations in central European languages as they moved generally northwest, far away from Vaticanist priests and metropolitan bishops.
The "assumption of Mary" was not even declared until Mariolatry needed a serious booster shot. What in the world did pre-19th century folks ever do without it?
And you have EXACTLY the same Biblical evidence for Apollos being assumed into heaven as Mary.
“And I ask you to note that the New Testament was never intended to be a comprendium of all doctrine,”
Here is where we must disagree. I believe that the entire Bible, taken in its entirety, using it to interpret itself, is indeed the comprendium of all doctrine.