Hello @MoniDi,
as I said above:
As I remembered having the same issue several months ago using German UI, I changed my UI language to English yesterday and found 918 items listed under My Contributions - the same for being logged in and anonymous.
Now we need to understand that My Contributions->Reviews not only contains the reviews, but also the ratings without text. I wrote 662 reviews thereof 660 reviews are public and 272 ratings (all public), therefore the total number of items listed should be 948, i.e. 16 (14 public) ratings and/or reviews are not shown.
The earliest reviews, I see on the desktop are also the oldest shown in the Android app.
So, it is not a matter of not showing the hidden reviews, but rather not showing all reviews/ratings under My Contributions->Reviews.
Interesting also the fact that the UI language plays a role for, how many are actually shown in the list.
BTW, this demonstrates again the need of an easier method to identify hidden photos and reviews. The method, I use is quite time consuming and cannot be used by everybody.
FYI @MortenCopenhagen @ErmesT @StevenBerlin @VinayJayaram