Looks like the Nougat update for Sony's Xperia Z5/Z4 Tablet and Z3+ series devices will soon be rolled out. That's because the update has been certified by PTCRB (a wireless device certification forum led by North American mobile operators). The update will move the build number from 32.2.A.5.11 to version 32.3.A.0.372. Sadly, there's currently no information on exactly when the roll out will begin, but given that the update has started collecting necessary certifications, that should happen sooner than later. Via
Source: http://www.gsmarena.com/nougat_update_for_sony_xperia_z5_z4_and_z3_receives_certification-news-22755.php