Checking Time Played - Sea of Thieves
I've searched the internet for months and haven't been able to find any way to view my Total Hours invested into the game. I'm aware there is a way on XBox but I play on PC so that doesn't concern me.
According to this and this Reddit thread, and the Sea of Thieves forum, total playing time just isn't available for Sea of Thieves.
Most users suggest extrapolating the time spent playing from the Distance Sailed, or the amount of cargo you have delivered.