Till Galaxy S10 series, Samsung never updated the OneUI 1.1 to the One UI1.5 or up. In terms of features, only a few of the features from the Galaxy Note 10 made to the S10 series. This year, this might change as Samsung is planning to update the Galaxy S20 series with OneUI 2.5.
However, it may not even happen, as Android 11 is right now in Beta, and is close to launch. So expect the series to get the Android 11 with OneUI 3.0 later on. But some tweets says a different case though. As per Ice Universe, the Galaxy S20 series will get OneUI 2.5, but will also get OneUI 3.0 along side Android 11 later this year.
The current UI update will bring new improvements to the currently installed OneUI 2.1. These new improvements will also include Google Gesture Navigation support for the third party launchers, and this was mentioned in the Samsung Members forum in South Korea as well.
This is yet to see as when Samsung will bring the new OneUI to the S20 series.