Exact 10 days ago, Samsung initially released the June 2021 security update to the Galaxy S21 series in South Korea. Later on, the international unlocked variant had also joined the party with the latest security patch, mainly in European countries.
Meanwhile, it looks like Samsung has forgotten to include some system function improvements as the Galaxy S21 phones start getting second June 2021 software update. Currently, this new update is rolling out in UAE and will soon make its way to other regions as well.
If we go with the changelog, the new Galaxy S21 series update brings improvements to the Camera performance for better imaging sensing. At the same time, it adds the same June 2021 security patch in order to increase the system security for a better overall user experience.
Recently, the South Korean tech giant published the June 2021 security bulletin, which clears the exact changes that arrive with this OTA. To be noted, it brings fixes for 47 CVEs from Google and 19 SVEs from Samsung for Galaxy devices.
If you own a Galaxy S21 series smartphone then you can manually check for the June 2021 security update by navigating to device Settings >> Software updates >> Download and install.