The pilot's camera at all unarmed (without weapon means) UAV can not turn on the night vision mode. This is after updating 1.76 and in DEV 1.77.
https://community.bistudio.com/wiki/File:B_UGV_01_F.jpg
https://community.bistudio.com/wiki/File:B_UAV_01_F.jpg
https://community.bistudio.com/wiki/File:O_UGV_01_F.jpg
https://community.bistudio.com/wiki/File:O_UAV_01_F.jpg
UAVs of this type are used in military operations, daytime and night.
I did not focus on UAV AL-6. But if something is used for military purposes, it may also need to be upgraded, in particular NV.