https://wccftech.com/it-is-now-possible-to-run-android-10-on-the-samsung-galaxy-s2-and-galaxy-note-3/

Android, for all its benefits, is still behind the times when it comes to software updates. Currently, the best one can hope for is three major software releases, that too only on some Pixel and OnePlus phones. Everyone else has to be content with two updates, while Apple users are guaranteed up to five updates. Even the newly-released Android 10 is yet to make its way to most eligible devices. Thankfully, Android has a vibrant developer community that more than makes up for the lack of official support. And now, the folks over at XDA Developers forums have successfully created an Android 10 port for the nearly ten-year-old Galaxy S2 and Galaxy Note 3.

As expected, Android 10 comes to the Galaxy S2 and Galaxy Note 10 in the form of LineageOS 17.1. Although there is no 'official' build of LineageOS running Android 10, the unofficial versions seem to be working fine, barring a few small hiccups here and there.