I was wondering the same... I cant see it on my s10..
But in the update features (in our s10 version ) it does say that we should have the features..
That is exactly right! I got the latest update today and it said in the update description that there will be an object eraser... Samsung promises but doesn't deliver.
So weird that I have to use 3rd party app on a Samsung device when they already have this feature available for the same software version on another Samsung device.
Time to switch to OnePlus 9 pro I think.