The latest Samsung devices to receive the May security patch are the Galaxy S20, S21, and Z Fold2 series. Besides the improved security, the S21 series and Z Fold2 have improved their cameras and quick share feature. For now, the update has been made available to European units.
Galaxy S20 and S21 series update logs (Source: AllAboutSamsung)
The S21 series becomes G98xBXXU3AUDA update version number which size is just under 1 GB. Z Fold2 update comes with the F916BXXU1DUDA build number and weighs just over 493MB. The changelog is the same as the S21 series.
Galaxy Z Fold2 update changelog (Source: AllAboutSamsung)
The S20 series obtains the G98xxXXU7DUDB updated to a slim 395MB with changelog detailing stability improvements and the latest security patch although the camera improvements from the S21 and Z Fold2 are missing here.
Going through (in German)