Only the seven Pauline letters undisputed as authentic (Galatians, Romans, 1 and 2 Corinthians, Philippians, Philemon, 1 Thessalonians) are typically viewed as being reliable because they are first hand and are the only writings we have with a known author. Acts is late and problematic and the other Epistles are believed to be pseudoepigraphal.

That doesn't mean it is assumed that Acts has no historicity, but that much caution is needed and Acts, all by itself, cannot be taken as certain evidence for any give claim.

Bart Ehrman: The New Testament: A Historical Introduction

The Acts Seminar Report: Acts and Christian Beginnings