Samsung has released a new software update for the Galaxy Note10+ which bumps up the Android security patch level on the smartphone to September 1, 2019. The new firmware also improves the audio quality through wired earphones on the Note10+. This update, weighing 157MB in size and bearing build number N975FXXU1ASHE, is rolling out over the air in India. It should reach all the units in a week or two, but if you can't wait, you can try pulling it manually by heading over to your phone's Settings > Software update menu. Source
Source: https://www.gsmarena.com/samsung_galaxy_note10_plus_september_patch-news-39084.php
