The update sports the build number S711BXXS5DXI3. You can download it over the air by hitting the Download and install button in your phone's Settings » Software update menu. If you want to upgrade your phone using a Windows PC, you can download the latest firmware from SamMobile.
More details after our One UI 7 hands-on video
The latest Galaxy S23 FE update brings the October 2024 security patch, which fixes 30 security vulnerabilities that were putting Android devices at risk. It also addresses some security flaws that exclusively affected Galaxy devices. Furthermore, it brings a fix from the Samsung semiconductor team for a security flaw that could cause issues on devices powered by some Exynos chips, including but not limited to the Exynos 2200 that powers the Galaxy S23 FE.
The October update doesn't come with any changes or improvements other than security fixes. That will likely be true for any other software update the S23 FE gets this year. The Android 15 and One UI 7.0 update that Samsung fans are waiting for will not arrive until 2025.