I'm using the latest build from Arnova here (https://www.celsoazevedo.com/files/android/google-camera/dev-arnova8G2/#apk411) and most features work including Night Sight. Not sure about EIS but takes better pictures than stock Nokia. Slower for sure due to HDR+, but can't complain about the quality.
Hi, no problem! I have "GCam_Pixel3Mod_1.3_build.6.1.021.apk" installed currently and have no issues with regular camera portrait or night sight. Have to disable motion picture or whatever it is called or it crashes per the instructions on the XDA forum threads for the Pixel3 mod.