The Verizon Xperia Z2 Tablet (SGP561) is still languishing on Android Kitkat, despite the global Xperia Z2 Tablet running Android 5.1.1 Lollipop. If you have had enough of waiting and want to take matters into your own hands, then an official unreleased Lollipop build is now available for you to download
Build number 23.1.D.0.509 is an internal test version of the Android 5.0.2 Lollipop firmware. The FTF firmware file is available to download below, which can be installed using Flashtool. Let us know how you get on in the comments below.