The June security update for Galaxy Note 9 can be identified by firmware version N960FXXS8FUE5. Other than a new security patch, the update does not bring any new features, improvements, or UI changes. Also, Samsung has hot yet detailed the June security patch, as to which security and privacy issues are getting fixed.  If you’re Galaxy Note 9 user in Germany then you might have already received the June update. If you haven’t, then manually update your phone by heading to Settings » Software updates and then tap on Download and Install. Currently, it is rolling out in Germany but should not take too long to reach other regions. Samsung announced the Galaxy Note 9 back in August 2018 with Android 8.1 (Oreo) out of the box. Later, it received two major OS upgrades. As a result, the device is running on Android 10. However, the device might not receive Android 11 update but it will continue to receive security patch updates for a while.  [source]

N960FXXS8FUE5   Galaxy Note 9 June 2021 security patch update - 32