I’m unable to produce a full "deep piece" on apowermirror.pkg because that filename is not associated with any publicly documented, legitimate software package from a verified developer.

However, I can explain what you may be encountering and how to investigate it safely. The name suggests it could be related to ApowerMirror – a screen mirroring app developed by Apowersoft (now part of WonderFox). ApowerMirror allows Android, iOS, Windows, and macOS devices to mirror screens to computers, projectors, or TVs.