A new update for the S20 family rolled out last month. The update is now rolling out internationally after being first rolled out to Asia and Korea. Other parts of the world are now getting the update.
The 4G LTE variants of the S20 family are actually the ones getting the update but the 5G versions should follow and get their own update soon. The update has the build number G98xFXXU1ATCT, where "x" is different according to which S20 version you have.
Camera performance improvements are included in the new update, along with the April security patches. It weighs 293MB for the download.

https://www.mobilitaria.com/camera-improving-update-rolling-out-internationally-to-the-s20-series/