If you are running the latest Windows Insider builds, for example in Windows 10 Build 17728 and you are running Hyper-V you will see two new improvements. These improvements are also in the latest Windows Server 2019 Insider Preview builds and will be available for production when Windows Server 2019 will be released.

Microsoft Hyper-V UEFI 2019

First Hyper-V UEFI now looks prettier and has more less the same still as other Microsoft devices like the Surface Book or the Surface Pro.

Hyper-V 2019 UEFI