In addition to the security patch dated January 2021, the OxygenOS 10.5.9 software update for OnePlus Nord N10 handsets also comes with improved network stability and optimized power consumption. Sadly, there are no fixes for the broken pocket mode and AR services yet, as well as a few other minor bugs.
https://www.notebookcheck.net/OnePlus-Nord-N10-gets-OxygenOS-10-5-9.515658.0.html