Based on Alexey GCam 6.1 for Mi 6, it is great :) Credits for Alexey for all gcam functions besides ones mentioned in changelog.
Load xml for Redmi Note 8 Pro before use (wyroczen_al2.xml). How to load.
-> fixed main camera viewfinder + HDR+.
-> changed packagename so all lenses are visible by gcam.
-> changed second lens ID to be ultra wide ID.
-> fixed distortion on ultra wide lens (needs further tests)
Noise reduction in this version works pretty good, no more excessive noise on aux(ultra wide).