This is a Google Camera APK base version 6.1.021 build version v1.7 ported by San1ty.
This GCam APK port released on February 2019.
Changelog of the GCam APK 6.1.021 San1ty's build v1.7:
- added new custom lib and removed some useless ones
- Should work perfectly on any Mi SD845 device or pretty much any SD845
- Poco F1
- Realme 3
- Realme 3 Pro