Because it sits in a gray zone:

The most common point of failure for PyClip is the OBD2 adapter. To be considered "verified" for use with PyClip, an adapter ELM327 V1.5 PIC18F25K80 chip The V2.1 Trap:

Because PyClip is not available on the official Google Play Store, users must download APK files from third-party repositories. A "verified" version generally means a build sourced from reputable community hubs where the code has been scanned for malware and tested for stability. Drive2.ru & 4PDA: