Other than the May security patch, the noticeable change in the latest update is the addition of 360 Audio feature, which can be used with Galaxy Buds Pro. This feature gives the user an immersive theatre-like multi-dimensional sound. Samsung has also improved the Quick Share file transfer feature in the latest update.
The update should be rolling out in a staged fashion, which means it may take a few days to reach your Galaxy A70. As mentioned above, the update is currently rolling out in Ukraine, but it won’t take long to start heading to other regions, where the device has been launched. To manually check for the latest update, navigate to Settings » System updates and then tap on “Download and install“.