What happens is that the browsers are detected whether if they were a mobile or a desktop browser, so that if it were a mobile device, the content downloaded will be smaller, less images and graphics to save you some bytes. This is important if you are using a mobile data plan.
The expected on any website that supports different devices is to provide all the details in all the devices, but in a different arrangement keeping the general look and feel. So in the stackoverflow website for mobile devices, I'm not sure if its meant to be like that, or its a small mistake, also the number of profile visitors is missing there btw.
Any way, to overcome that, some browsers settings can be modified to tell a server that they are a desktop browser not mobile, then it will load the page that you see usually on desktop browsers.
This also works in the other way around; in desktop browsers, firefox for example, you can install some plugins that will change the content view of your browser to a specified device.
All these tweeks are usually for testing, debugging.
I tested that using an application from Google Play Store called Desktop Browser, it is good, but ads of course will annoy you sometimes
I'm sure there are tons of other applications, better than this one, but it works...
Hope this was useful.