Like front door locks, your computer is only as secure as it’s last patch release. Keeping computers updated to the latest stable release should be an important part of your IT provider’s tasks.
That said, Windows 10’s May Release (release 2004) was a big package and ran into release problems. Depending on your hardware configuration, it may not yet be available for your machine.
Wait for Microsoft to tell you when it’s ready. Don’t push it! Manually forcing this upgrade can break your system. Read more here.