I’m using both the lower shelf at the lowest position possible (so that I can tuck the keyboard underneath the monitors) and the top shelf at the highest position.
In this case there is a 50cm clearance without any issues, 53/54cm if pushing it.
If removing the bottom shelf, keeping only the main desk top and the top shelf there is at leas a 60cm clearance without any issues, and around 63/64 pushing it. I mean pushing it where the monitor top might be under the front “bar” of the top shelf. But that doesn’t bring as far as I can see any visibility issues.
So if the height of your monitor is only 47cm, it will fit without any issues with the bottom and top shelf in their places.
Hope this helps.