For LMC R18F1 (I recommend LMC8.4_R18F1_Google_Lens.apk).
Changelog:
General:
-Some stuff i don't remember.
Main lens:
-None
Tele lens:
-None
Ultrawide lens:
-None
Front:
-None
Known Bugs:
-If the Ultrawide lens is selected and you switch to the selfie camera, the preview picture will be upside down. Workaround: Select the Main or Tele lens before switching to the selfie camera.
Setup:
-Install LMC 8.4 R18 GCam Port.
-Download the XML file and copy it to PhoneStorage/LMC8.4/
-Launch the LMC GCam Port and double tap on the space between the shutter button and the image preview button on the right.
-Select the downloaded XML file and click on import.
Notes:
I recommend staying on this GCam 8.4 Port for now. It is the most stable with the fewest bugs on the Surface Duo 2. Newer GCam Ports have UI bugs and bugs while saving HDR+/Night Sight images (in addition to green shadows instead of black ones. This behaviour is also fixed in this GCam Port and these custom Settings).