While Samsung does a great job of supporting older phones, it may take a long time for major software updates to reach your phone.
According to mspoweruser, Samsung has already released Android 12 and OneUI 4.0 for the Samsung Galaxy S21, Z Flip 3 and Z Fold 3, but the Koreans are currently working on OneUI 4.1 and this version of Samsung UI is expected to be the first Load with Galaxy S22.
According to an observer from Samsung Support Associations, the update will be available at about the same time for the Galaxy S21, Galaxy S21 Plus, Galaxy S21 Ultra, Galaxy Note 20 and Galaxy Note 20 Ultra. With the Galaxy S22 set to launch in early February 2022, other handsets are expected to be updated at the same time.
Updates for other handsets like the Galaxy Z Flip 3, Galaxy Z Fold 3, Galaxy S20, Galaxy S20 Plus and Galaxy S20 Ultra have not been confirmed yet, but these devices do not seem to lag far behind their families. OneWI 4.1 is expected though The update is relatively minor, but seems to bring some new features to Samsung phones.