A new leak has revealed the Galaxy S21 FE's inaugural firmware in Europe. The firmware confirms that the Fan Edition smartphone will launch with Android 12 and One UI 4, recently released to the Galaxy Z Flip3 and Galaxy Fold3.
https://www.notebookcheck.net/Samsung-Galaxy-S21-FE-to-launch-with-Android-12-as-initial-firmware-leaks.583643.0.html