Let's have a look at Commons' mobile site:
Comparing it to the desktop site's upper right corner,
it is obvious the mobile version simply forgot to put "Uploads" in their menu.
(And not for lack of space in that menu.)
Indeed, Uploads is the defining feature of Commons.
No, I am not talking about "I want to upload a file". That is already on the home page.
I am talking about "I want to see my uploads."
(And no, asking the user to press Contributions is much different.)
Let's compare Wikipedia's mobile menu:
Here they have added Sandbox. Therefore perhaps Commons mobile could add Uploads.