: This site hosts the exact 5.200604.2138build-7.3.021 version you mentioned. It requires Android 8.1+ and is designed for arm64-v8a devices.
: GCam ports are often hardware-specific. If this build crashes, you might need a specific Config XML file for your phone model, which can usually be found on the same download page. Download GCam 200604 2138build 021 apk
Are you trying to get this working on a , or : This site hosts the exact 5