After an extended period of testing in the Release Preview ring, Microsoft has finally started rolling out the May 2019 Update to Windows 10 users, albeit in a “measured and throttled” way.
You might be able to get it now by going through Settings > Update & Security > Windows Update or, failing that, via the Media Creation tool. There is a very simple way to force Windows 10 to start the upgrade process immediately however.
If the new feature update is not currently showing up in Windows Update, then go to the Download Windows 10 page, and click on the Update now button. Doing so will download the Windows 10 Update Assistant — a small 5.9MB file.
Save and launch this and then click the Update Now button. It will check to make sure your PC is compatible in terms of CPU, memory and disk space, and then download and verify the files needed for the update.