I cannot think of any addon that provides this.
Maybe Inventory Insight from Ashes was able to do so as it is an addon which collects data about your other not-logged in characters (if you log them in to collect the data!) too.
inventory insight definitely does this, but im only seeing those counts on the bottom when i hover over an item within the actual inventory insight window, not like in your normal bag/bank/storage
there may be a setting to add that part to every tooltip, but i havent gone in depth on those settings to know for sure
This is a picture of what I am looking for. It is on for at least some of my characters on PC NA, but not PC EU.
Not sure which addon. I have looked at many settings, but it is probably one I am just looking past.