Is there even any point in searching for it?

I have (well… had) a DJI Mavic Pro that dropped into a lake about 3 or 4 months ago from a height of 210 ft. My theory is that the battery may have died even though I had 21% left and was going back to land but they were the original batteries from 2017. I do wonder the odds of it being salvageable especially if the battery completely failed like I suspect. I know the last known location via the GPS but could not get a good look at where it splashed. The water depth is probably between 4 and 8 ft so it wouldn’t be too Hard to get it once I find it but it is quite a long way away from where I live and I am 16 and do not have my own vehicle or boat so I need to rely on them to get me there but I don’t want to waste their time retrieving a dead drone. Thank you. When I get home I can attach a video of flight logs if needed.