The Galaxy Note 10 and Galaxy Note 10+ are now receiving an update with the March security patch in some markets, including the Netherlands, the UK, Spain, and Hungary. These markets saw another update roll out for the Note 10 and Note 10+ just a few days back. That update had improvements for facial recognition and navigation gestures while the one that's rolling out now only includes the latest security patch.
This is just another example of how Samsung has ramped up its efforts to update its flagships with the latest security fixes as quickly as it can each month, even though the company still tends to not release these updates in every country at the same time. Samsung also released the March security update for the Galaxy S10 series a couple of days back. The patch fixes one critical vulnerability in Android OS and 25 vulnerabilities that are limited to Galaxy devices.
The March update carries software version N97xFXXS3BTB9; you will also receive a notification informing you about the update once it becomes available in your country. If you don't feel like waiting, you can manually download it from the phone's Settings » Software update menu. Another way to update your phone is by flashing the latest firmware on it using a Windows computer. You can find firmware for the Note 10 and Note 10+ (and many other Galaxy devices) in our firmware archive.