On the left of the face emoji, in the top bar, you should see the number of remaining mines. It's not exactly like the version you linked, which should "number found / total", as what I show is simply "remaining mines". Is that what you mean?

Although the number I show is actually a bit sneaky, as I subtract the number of flags placed to the total number of mines. So if you were to place more flags than mines, you'd see a negative number. (which I realise as I type that your version is similar, as the number can also go above the total).