Samsung is on a roll with its One UI 5.0 updates and the lates device to get the Android 13-based update is the Galaxy Z Flip 5G which launched a few months after the original first-gen Z Flip back in 2020.
The firmware update is reportedly exclusive to the 5G model for now though Samsung will also bring the update to the LTE model as per the official One UI 5.0 update rollout schedule timeline. Galaxy Z Flip 5G owners in Europe have reported the update is available for their phones and we can safely expect more regions to follow in the coming days.
The latest One UI 5.0 update is probably the last major firmware update for both first-generation Galaxy Z Flip models. Both launched with One UI 2.1 based on Android 10 in 2020 and Samsung supports three major OS updates.