Yes a few of us have 3.1 , though the object Eraser does not seem to be included on the S10 at the moment anyway. It is enabled by activating Labs via photo editor but the option is not available for me. https://www.androidcentral.com/how-use-object-eraser-samsung-phone
A few links to 3.1 and previous discussion https://www.getdroidtips.com/g973fxxu9fubd-g975fxxu9fubd/ https://eu.community.samsung.com/t5/galaxy-s10-series/one-ui-3-1/td-p/2985731/page/2
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB
One Ui 4.0,Android 12 Official Version.