No doubt, most OEMs gives more attention to its recent devices but this does not mean that these companies completely forget their older smartphones. Samsung is currently rolling out the June security patch to six of its devices some of which are quite old. These smartphones include new Galaxy S9 and S9+, Galaxy A6, Galaxy J7 Pro, Galaxy J2 Prime and Galaxy A5 (2016).
As for Samsung Galaxy S9 and S9+, the updates come with software versions G950USQU4CRE9 and G955USQU4CRE9, respectively (U.S. versions) while the Galaxy J2 Prime, Galaxy A5 (2016), Galaxy A6 and Galaxy J7 Pro carries software version G532MUMS1ARF2, A510MUBS4CRF2, A600GNUBU1ARE2 and J730GMDXU3ARF2 respectively.
These updates are rolling out OTA and as usual, it may take some time before all units get the download notification. Alternatively, you can access Settings > About phone > System update to check if this update is available for download manually. Since it is not a major update, you can be certain that the file size will not be significant.