Just had this installed on my laptop. You must specifically ask for it via settings/update and security - it is offered as an optional update. When the request to reboot for installation came I was surprised at how fast the process was, to the point I could not believe the update had been installed until I looked at settings/system/about.
Googling about the update has revealed a different approach for this release for those upgrading from 1903 (like me). If there has been much comment on GZ on this I have not seen it. This release downloaded and installed like a cumulative patch - just a few seconds to shutdown and a fw seconds to install after reboot. All good.
Fixed typos