https://www.celsoazevedo.com/files/android/google-camera/f/changelog929/
Go into the settings, and turn on HDR + Enhanced, it is into the first row of settings, one needs to click on the arrow on the main screen of the GCAM APP to enter the settings, you turn on HDR + control & HDR enhanced into the first screen of the settings/disable motion (that part of the UI) you must make sure HDR + Enhanched is enabled, triple check in the main settings into the viewfinder.
Set HDR frames to 30/45.
Go to lib patcher, turn it on, go into back camera, set it to chroma denoise = 1.0, luma denoise 0.5
Go back, take a night mode picture, be stunned. Hint, the main camera works perfect, its a bit slow into processing times, but the picture will be MILES better, if you don't want to wait so much, turn off HDR + Enhanced, and let the HDR frames at default.
Always tap to focus before taking a picture, and pay attention if the object is IN FOCUS before you take the picture.
P.S. Close all other apps from background before using this app, it is resource heavy, and do not take more shots until the first one is completely processed, you can follow the processing progress if you open the picture in the viewfinder, you need to wait around 10 seconds to be able to do so, it is slow, but the results are stunning. If waiting is not an option, turn off HDR + enhanced, and leave HDR + settings to default, by doing so you will lose some image quality, but you will be able to take shots of moving subjects without any blurring. The degradation in quality is quite noticeable in low light/darkness.
With this settings, the MI Note 10, D E S T R O Y all high end photos currently available, it toys with them, it crashes them. I have tested it vs S10 both Snapdagon and Exynos, vs iP11, vs P30 pro and so on. The difference is brutal.