Hi @gillo! Thanks for contributing to MDN!
As @sphinx_knight mentioned, we have a page that lists pages that need editorial reviews. Since you didn’t find it, that may mean that we need to link to it in more places, to make it easier to find. It would help to know where you were looking to find pages to review. Or were you just going through pages manually?
Also, note that the “Needs Review” page is not updated immediately when you clear a review flag. So, if you review a page, clear the “Editorial review” flag on that page, and then go back to the “Needs Review” page, the page you just reviewed will still be listed. You need to do a hard refresh (Shift-Refresh) to cause the list to be regenerated. Regenerating the list may also take some time. But eventually, the list will be updated and the page you reviewed will no longer be listed.