All practices in the Book of Acts, God inspired to be recorded in His Holy Word. Of course, I would disagree with the interpretation of the subtitles that are not inspired.
Then do you agree that these practices happened after the Resurrection and more after the Ascension and even more after the Descent of the Holy Spirit upon the Apostles — all of which took place in the century of Christ?
Resurrection to Pentecost — 50 days — that’s hardly the year 300.
I don’t believe I quoted any subtitles. ??Why do you even mention it?