I'm sure they haven't officially ended support, however blackview don't seem to operate like a respectable company with business plans, targets or deadlines it's just if they get around to it. Hence they will NEVER tell you when they expect this ROM to be working. We need to be realistic, they will never get around to it because we have already seen this phone is not a priority and if it isn't a priority now it never will be. I will never buy another blackview, did you know they are still advertising this ROM on the website and its battery saving capabilities?! Unreal.
They did a good job with other older firmwares and fixed deep sleep in 201712 firmware, so I think that update will come.
But I'd like to know if could you tell us a date? Or this is really the end of support for this model?