The latest OTA update for Galaxy Note 20 does not bring any new features apart from a new security patch. It can be identified by firmware versions N981U1UES2DUC8 and N986U1UES2DUC8 respectively for Galaxy Note 20 5G and Note 20 Ultra 5G. 

As per the information, the update is yet to reach the Exynos variant of Galaxy Note 20 series in European and Asian markets. We can expect the manufacturer to roll out the update very soon in the remaining markets. To manually check for the latest update, navigate to Settings » Software update.

April 2021 security update rolling out for Galaxy Note 20 5G and Note 20 Ultra 5G - 3April 2021 security update rolling out for Galaxy Note 20 5G and Note 20 Ultra 5G - 91