A "Pro Mod" version is not an official release. Instead, it is a third-party modification created to bypass the app's standard limitations.
These files are hosted on third-party forums and "mod" sites rather than the Google Play Store. Critical Risks of Using Modded APKs LazyMedia Deluxe v3246 Pro Modapk
It allows users to search for and stream movies, TV shows, and other video content from multiple third-party providers simultaneously. A "Pro Mod" version is not an official release