Samsung has rolled out Android 10 for several smartphones but the Galaxy Fold, its most expensive smartphone yet had to wait until now to get the latest version of Android. Samsung has released the much-awaited Android 10 update for the Galaxy Fold. The new firmware sports version F900FXXU3BTCD and brings in the March 2020 Android security patch along with One UI 2.0. The update is currently seeding to the 4G model in France, but it should arrive in other markets soon. You should see an update prompt on your Galaxy Fold in a few days, but those impatient can check for it manually...
Source: https://www.gsmarena.com/samsung_galaxy_fold_android_10_update-news-42261.php